Eastern Seaboard Region Lithic Material
Name | Natural | Non-heat treated points | Heat treated points | Color details | Primary found in: | Associated Formation / Member |
Aaron Slate AKA: Sandy Tuff |
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Ranges from a pure greenstone to a almost pure argillite | North Carolina, Virginia | Aaron Formation of the Virginia Carolina Slate Belt | |
Abbyville Gabbro |
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Dark greenish gray | Virginia, North Carolina | Abbyville Gabbro Formation | |
Accomack Mudstone |
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Ranges in color from a light or medium brown to a yellowish mustard brown. | Virginia, Maryland, Delaware | Yorktown and Omar formation estuarine deposits | |
Allendale Chert (Coastal Chert) |
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Primarily tan to brown in various shades of "earth tones". |
Georgia, South Carolina | |
Allentown Chert |
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Ranges from a medium to dark gray with white streamers with banding commonly present. Oolitic and stromatolitic. | West Virginia, Maryland, Pennsylvania, New York, Vermont, Connecticut | Allentown Formation |
Allentown Quartzite |
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Ranges from a very light gray to a medium light gray. | West Virginia, Maryland, Pennsylvania, New York, Vermont, Connecticut | Allentown Formation | |
Alsen Chert |
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Mottled dark gray to a dark brownish gray. | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | Alsen Cherty Limestone Formation of the Helderberg Group |
Amber Chalcedony AKA: Weathering Amber Chalcedony |
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When freshly fractured is a translucent amber with snowflake like inclusions, when weathered has a chalky white to yellow appearance | Virginia, North Carolina | ||
Antietam Quartzite AKA: Erwin-Antietam Quartzite |
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Ranges from bright white to light gray, tan, brown, pink, or red, a greenish brown variation is reported | West Virginia, Virginia, Delaware, Maryland, Pennsylvania, | Antietam Formation of the Chilhowee Group | |
Aquia Orthoquartzite |
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Ranges from white to tan, light gray, or brown. Finer grain can range from tan to brown, gray, yellow, or red. |
Delaware, Maryland, Pennsylvania, Delaware | Aquia Quartzite Formation | |
Argillite (Generic type) |
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Light to dark green, but may range to various shades of gray. | North America | Varies | |
Arnolds Valley Jasper AKA: Rockbridge Jasper |
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Ranges in color from yellow to red with white streaks of quart. | Virginia, West Virginia | Chilhower Group | |
Arvonia Slate |
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Ranges from a dark gray to a grayish black. | Virginia | Arvonia Formation | |
Bangor Chert |
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Translucent and banded, ranging in color from black to a dark bluish gray or greenish | Tennessee, Georgia, Alabama, Mississippi, North Carolina | Bangor Limestone formation |
Beacon Hill Gravel Chert / Quartzite |
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Nodules of chert and yellow quartzite. | Maryland, New Jersey | Beacon Hill Formation |
Beasley Bay Jasper |
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Ranges from a mustard yellow to a brownish yellow or red. | Virginia, Maryland, Delaware | Kent Island Formation | |
Becraft Chert |
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Light bluish gray to medium gray or black | New York, New Jersey, Maryland, and Virginia | Becraft Limestone Formation of the Helderberg Group |
Beekmantown Chert AKA: Narrows Chert |
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Dark gray often fossiliferous. | West Virginia, Virginia, Maryland, Pennsylvania | Beekmantown Formation |
Bellefonte Chert |
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Ranges from a light to medium gray | Pennsylvania, Maryland, West Virginia, Virginia | Bellefonte Dolomite Formation of the Beekmantown Group. |
Bellvache Creek Petrified Wood |
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South Carolina | |||
Berea Sandstone |
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Ranges in color from a light gray to a buff | Ohio, Michigan, Pennsylvania, West Virginia, and Kentucky | Waverly Group | |
Black Mingo Chert |
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Mottled white, light tan, and gray. | South Carolina, Georgia | Lang Syne Formation of the Black Mingo Group | |
Boggs Chert AKA: Blunt Run Chert |
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Ranges in color from a dark gray to black with numerous white or light colored speckles from fossils | Ohio, Pennsylvania, West Virginia | Boggs Member of the Pottsville Formation |
Bonifant Jasper AKA: Bonnefont Jasper |
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Mottled mustard yellow to a yellowish brown or a variegated red | Virginia | porphyoblastic garnet-biotite gneiss formation | |
Bourne Chert AKA: Brunswick County Chert |
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Predominantly brown to cream, red, or violet, but ranges from pink, yellow, brown, orange, and light blue also occur. | Virginia | |
Brandywine Blue Gneiss AKA: Wilmington Blue Rock |
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Ranges from a bright blue to a bluish gray. | Delaware, New Jersey, Pennsylvania, Maryland | Brandywine Blue Gneiss Formation of the Wilmington Complex | |
Breathitt Chert |
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Range from a dark chocolate brown to a black or from shades of brownish green to tan with tan or yellow inclusions are often present. | Kentucky West Virginia | Breathitt Formation |
Breccia Quartzite |
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West Virginia | |||
Brier Creek Chert AKA: Stoney Bluff Chert, Red Bluff Chert |
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Ranges in color from white to cream, tan, and gray with mottling commonly present. | Georgia, South Carolina | Possible Suwannee Limestone Formation |
Bremo Quartzite |
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Light gray | Virginia | Bremo Quartzite Member of the Arvonia Formation | |
Broad Run Chalcedony AKA: Wissahickon Chalcedony |
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Ranges in color from a mottled white to light gray or cream to yellow. Black specks are present through the material. | Virginia, Delaware, Maryland | Wissahickon Formation | |
Brook Run Jasper |
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Ranges from a mustard yellow to a yellowish brown or red with white quartz streaks running through the material. | Virginia | ||
Brush Creek Chert AKA: Crooksville Chert, Hughes River Chert |
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Varies in color from a tan to a brown olive or light green | Ohio, Pennsylvania, West Virginia, and Kentucky | Brush Creek Limestone Formation, Conemaugh Group |
Buffards Quartzite |
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Ranges from a milky white quartz to a dusty red quartzite. | Virginia | Buffards Quartzite Member of the Arvonia Formation | |
Calvert Silicified Sandstone |
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Ranges from a light gray to a bluish gray or dark gray | Virginia, Maryland, Delaware | Calvert Formation, Chesapeake Group | |
Cambridge Chert |
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Gray colored chert | Ohio, West Virginia, Kentucky | Cambridge Member of the Conemaugh Formation |
Cannel Coal |
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Ranges from dark gray to black | Kentucky, Pennsylvania, West Virginia, Texas, and Nova Scotia. | ||
Catoctin Greenstone AKA: Catoctin Metabasalt |
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Ranges from a green to a greenish gray or gray. | Virginia, West Virginia, Maryland, Pennsylvania, Delaware | Catoctin Formation | |
Catoctin Metarhyolite AKA: Highland Metarhyolite |
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Ranges from a gray to a bluish gray, blue, or purple. Banding, mottling, or breccia with a tannish color may be present. | West Virginia, Virginia, Delaware, Maryland | Catoctin Formation | |
Cecil Black Chert AKA: Newark Chert |
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Ranges from a medium gray to black | Delaware, Maryland, Pennsylvania | Newark Gabbro Formation |
Chattahoochee Chert (Coastal Chert) |
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Ranges from brown to a creamy tan with dark gray, black, and bluish white also occurring. Clear chalcedony and mottling occurs. | Georgia, South Carolina | Chattahoochee Limestone Formation |
Chepultepec Chert
Knox Chert Variant (Ridge and Valley Chert) |
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Ranges from yellow to white and oolitic | Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania | Chapultepec Member of the Knox Formation |
Chickies Quartzite AKA: Chiques Quartzite, Hellam Quartzite, Edge Hill Quartzite |
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Ranges from white to gray or tinted pink, tan, green, or blue | Pennsylvania, Maryland | Chickies Formation | |
Chilhowee Mudstone |
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greenish-gray in color | Alabama, Tennessee, North Carolina, Virginia, and West Virginia. | Chilhowee Group | |
Cid Meta- Mudstone |
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Thinly laminated tuffaceous argillite mudstone ranging from a bluish gray to a greenish gray. | North Carolina, South Carolina | Cid Formation of the Albemarle Group | |
Coeymans Chert AKA: New Creek Chert |
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ranges in color from a bluish black to black. Cloudy patches of fine pyrite and quartz may be present. | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | Coeymans Limestone Formation (New Creek Formation), Helderberg Group |
Cohansey Orthoquartzite |
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Base color of grayish white with mottled colors including yellow to brown, orange to red, or black | Maryland, New Jersey | Cohansey Formation | |
Columbia Formation Quartzite |
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Ranges from a yellowish brown to a reddish brown. | Delaware, Maryland | Columbia Formation | |
Conococheague Chert |
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Ranges from a gray to a bluish gray, brownish gray, or black. Small blue to white inclusions may be present. | Virginia, Tennessee, West Virginia, North Carolina | Conococheague Limestone Formation |
Copper Ridge Chert (Ridge and Valley Chert) |
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Ranges in color from medium to dark gray to black | Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania | Copper Ridge Member of the Knox formation |
Crystal Quartz |
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clear colorless stone similar to clear glass | Eastern North America | ||
Culpepper Hornfels |
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Range from a brown to reddish brown or greenish brown and gray to black. | Virginia, Maryland | ||
Cuesta Quartzite |
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Ranges in color from pale grayish brown, pink, or reddish. | Delaware, New Jersey | ||
Erwin Quartzite AKA: Erwin - Antietam Quartzite, Hesse Quartzite |
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Ranges from bright white to light gray, tan, brown, pink, or red. A green brown variation is reported in Amherst County, Virginia | Tennessee, North Carolina, Virginia, South Carolina | Erwin Formation of the Chilhowee Group | |
Fishpot Chert |
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Primarily light to dark brown and gray in color. High quality similar to chalcedony. Light banding with small bluish gray chalcedony inclusions. | Ohio and West Virginia | Fishpot Limestone Member of the Monongahela Formation |
Flint Ridge Chert /Chalcedony AKA: Van Port Chert, Raccoon Creek Chert |
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White to bluish hues with bands of light gray, reds, and yellows | Ohio, Michigan, Ontario, Indiana, Kentucky, West Virginia | Van Port Member of the Allegheny Formation |
Flint River Chert AKA: Butterscotch Chert (Coastal Chert) |
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Ranges from a yellowish brown to a medium brown. | Alabama, Georgia, Florida, South Carolina | Flint River Formation, Vicksburg Group |
Flint Run Jasper |
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Mottled mustard yellow to brown, but gray, red, blue, and green also occur as streaking or inclusions and quartz inclusions. | West Virginia, Virginia, Maryland | Between the Beekmantown Formation and the Blue Ridge Formation | |
Floyd Church Meta-Argillite / MetaMudstone |
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Gray | North Carolina | Floyd Church Formation of the Albemarle Group | |
Fort Chiswell Chalcedony |
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Mottled with light colors of white tan, and gray. | Virginia | ||
Fort Payne Chert AKA: Iuka Chert, Lauderdale Chert |
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Ranges in color from black to a grayish blue, or white to a bluish white. Bluish gray is the predominate color with bluish hues | Kentucky, Tennessee, Alabama, Mississippi, Georgia, South Carolina, North Carolina, Virginia, West Virginia | Fort Payne Formation | |
Georgiates |
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Translucent olive green. | Georgia, South Carolina | Chesapeake Bay Impact | |
Greenbrier Chert AKA: Alderson Chert |
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Ranges in color from light to dark grays, browns, black, and pale red. | West Virginia, Virginia | Greenbrier Formation |
Greenfield Chert |
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Ranges from a light to dark gray with white chalcedony / quartz inclusions.. | Ohio, West Virginia, Kentucky | Greenfield formation, Saline Group |
Hardy Creek Chert |
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Ranges from a brown to a gray or an olive black | Virginia, West Virginia, Kentucky, Tennessee | Hardy Creek Limestone Formation |
Hardyston Chalcedony |
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Semi translucent milky white to light blue or light to gray. | Maryland, Pennsylvania, New Jersey, Delaware | Hardyston Formation | |
Hardyston Jasper AKA: Berks Jasper, Lehigh Jasper, Pennsylvania Jasper |
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Ranges from a dark golden yellow to a bright red or dark brown with mottling as well as tiny veins of clear to white translucent chalcedony. | Maryland, Pennsylvania, New Jersey, Delaware | Hardyston Formation | |
Hardyston Quartzite |
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Ranges from a milky white to light blue to a light yellowish brown or gray. | Maryland, Pennsylvania, New Jersey, Delaware | Hardyston Formation | |
Harpers Ferry Quartzite AKA: Oolitic Quartzite |
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Ranges from a light gray to light blue with round speckles colored dark gray to a bluish gray or cream to light gray | Virginia, North Carolina, Maryland | Possible Harpers Formation of the Chilhowee Group | |
Heath Farm Jasper AKA: Delmarva Peninsula Jasper |
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Ranges from a brownish to dark brownish black. | Delaware, Maryland, Pennsylvania | ||
Helderberg Chert |
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Ranges from mottled white to light cream, light gray, and light blue commonly mottled and fossiliferous. | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | Helderberg Group |
Hillsdale Chert |
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Black weathering gray. | West Virginia, Virginia, Kentucky | Hillsdale Limestone Formation |
Honaker Chert / Dolomite AKA: Nolichucky Chert |
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Dolomite is a light to medium gray with banding present, minor chert nodules of dark gray to black with algal banding | Virginia, Tennessee, North Carolina | Honaker Formation / Nolichucky Formation |
Hunterville Chert |
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Ranges from a yellowish gray to a gray or dark gray. | West Virginia, Virginia | Hunterville Chert Formation of the Oriskany Group |
Indian Run Chert |
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Mottled with shaded of medium to dark gray and white. | Virginia | |
Iron Hill Jasper AKA: Newark Jasper |
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Ranges from a mottled mustard yellow to brown, dark brown, brownish black, and red. | Delaware, Maryland, Pennsylvania | Newark Gabbo Formation | |
Kalkberg Chert |
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Ranges in color from a grayish blue to a black. This chert is heavily cloudy by opaque patches. Clastic quartz is present | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | Kalkberg Formation of the Helderberg Group |
Kanawha Black Chert |
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Vary from a black to a bluish black /gray to a dark gray | West Virginia and into Pennsylvania, Virginia, Ohio, Maryland, and Kentucky | Kanawha Formation, Pottsville Group |
Kingsport Chert |
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Ranges from white to a medium to dark gray. | Tennessee, North Carolina, Virginia | Kingsport Formation of the Beekmantown Group |
Knox Chert |
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Dark blue to bluish gray with translucent mottling. Red Knox Chert has a reddish color with slight mottling. | Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania | Knox Formation | |
Laurel Run Chert |
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Ranges from a light to dark gray or black with tan, pink, and white also occurring. | Virginia | |
Lenoir Chert |
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Dark Gray | Tennessee, Virginia, West Virginia, Kentucky, South Carolina, Georgia, Alabama | Lenoir Limestone Formation |
Libertytown Metarhyolite |
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Ranges from a dark purplish to a bluish black or red with macrophenocycts of pink and white feldspar. | Maryland, Virginia, West Virginia, Pennsylvania | Libertytown Metarhyolite Formation |
Licking Creek Chert |
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Black with sandy texture inclusions. | Pennsylvania, Virginia, Maryland | Licking Creek Member of the Helderberg Formation |
Limeport Chert |
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Ranges from a gray to a bluish gray or black, banding may be present. | Pennsylvania, Maryland, New Jersey | Limeport Member of the Allentown Formation |
Lincolnshire Chert AKA: Murat Chert |
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Ranges from a very dark gray to olive black. | Virginia, Tennessee | Lincolnshire Limestone Formation of the Cliffeld Group |
Lisbon Chert AKA: McBean Chert, Silicified Chert Hash (Coastal Chert) |
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Ranges from red to yellow or cream to blue. Mottling or striping may be present. Jasper and chalcedony also occur in this formation. | Georgia, Alabama, South Carolina | Lisbon Limestone Formation of the Clairbourn Group |
Little Cattail Creek
Chert / Chalcedony AKA: Williamson Chert, Dinwiddie Chert |
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The most common colors range from a light tan to brown and gray to blue with a mottled creamy gray-blue being the most common. | North Carolina, Virginia | ||
Little River Metadacite |
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Opalescence bluish gray quart weathering to a crusty tannish white. | Georgia, South Carolina | Little River Volcanics Series | |
Liver Jasper |
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Red liver colored jasper with hematite spherules | Virginia | ||
Longview Chert Knox variation |
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Primarily reddish, but white to gray colors do occur | Georgia, North Carolina, South Carolina, Alabama, Tennessee, Virginia, Maryland, West Virginia, Pennsylvania | Longview Member of the Knox formation |
Lower Mercer Chert |
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Bluish gray color with quartz inclusions. | Pennsylvania, Ohio, Kentucky, West Virginia | Lower Mercer Member of the Pottsville Formation |
Luray Jasper |
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Maroon red with epidote inclusions | Virginia | ||
Martin Point Jasper |
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Ranges from a mustard yellow to a yellowish brown or red. | Maryland | ||
Mascot Dolomite / Chert |
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Ranges from white to a light to medium gray with with mottling or streaking ranging from pink to red or green | Tennessee, Virginia, Kentucky, North Carolina | Mascot Dolomite Formation of the Newala Group |
Meadow Mountain Chert |
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Mottled blue gray with white streaks present. |
West Virginia, Maryland | Possible Foreknob Formation | |
Mitchell Chert |
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Ranges from white to dark brown with the most common colors being from a light cream to yellow, light gray to blue, and pink to violet. | North Carolina, Virginia | |
Mogothy Quartzite AKA: Magothy Quartzite |
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Ranges in color from gray to bluish gray or purple, banding or mottling may be present. Small fossils may give a peppered appearance. | Virginia, Delaware, Maryland | Mogothy Formation | |
Morrow Mountain Rhyolite AKA: Uwharrie Rhyolite |
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Homogeneous dark gray to black and many shades of green, flow banding may be present. | South Carolina, North Carolina, Virginia | ||
Mount Rodgers Rhyolite |
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Ranges in color from a dark white to gray and light pink to purple with banding being present | North Carolina, Virginia | Mount Rodgers Formation | |
Nethers Chert Flint Ridge Chert variation AKA: Ribbon Chert |
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Banded with colors ranging from light gray to black, pink to red, or tan to brown | Ohio, Indiana, Kentucky, West Virginia, Pennsylvania, Michigan, Ontario | Van Port Member of the Allegheny Formation |
Newman Chert |
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Ranges in color from yellow to tan, red, and orange | Kentucky, Tennessee, Virginia | Newman Limestone formation |
New Market Chert AKA: Row Park Chert |
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Ranges from a dark gray to black. | Virginia, West Virginia, Pennsylvania, Maryland | New Market Limestone Formation of the St. Paul Group |
New Scotland Chert AKA: Corriganville Chert |
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Ranges from a white to very light colors. | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | New Scotland Formation (Corriganville Formation) of the Helderberg Group |
Nittany Chert |
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Ranges from a medium to dark gray with siliceous oolites. Red jasper also occurs in this formation. | Pennsylvania, Maryland, Virginia, West Virginia | Nittany Dolomite Formation, Beekmantown Group |
Nottoway River Quartzite |
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Two variations, one is a light blue and the other is a root beer brown. |
North Carolina, Virginia | ||
Obryan Chert AKA: Southern Vanport Chert |
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Ranges in color from a mottled gray to white with calcium carbonate vermiculate lines | Ohio, Kentucky, West Virginia | Obryan Member of the Allegheny Formation |
Onodaga Chert AKA: See page |
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Vary from light to dark gray to a mottled bluish gray to a dark brown or black or tan. | West Virginia, Virginia, Delaware, Maryland (see page for full list) | Onondaga Limestone Formation |
Oriskany Solicified Sandstone |
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White | New York, Pennsylvania, New Jersey, Maryland, West Virginia, Virginia | Oriskany Sandstone Formation | |
Orthoquartzite (Generic type) |
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Varies | North America | Varies | |
Patuxent - Mattaponi Quartzite AKA: Mattaponi Quartzite |
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Ranges from gray to a white, light yellow, pink or red. range sin color from a dark white to gray, cream to yellow, and pink to red. | West Virginia, Virginia, Maryland, Pennsylvania, North Carolina | Patuxent / Mattaponi Formation | |
Patton Chert |
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Ranges from a dark gray to black. |
West Virginia, Virginia | Patton Limestone Member of the Greenbrier Limestone Formation |
Pinesburg Station Chert |
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Ranges from a white to very light gray. | West Virginia, Virginia, Maryland, Pennsylvania | Pinesburg Station Formation of the Beekmantown Group |
Point of Rocks Jasper |
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Ranges from a mustard yellow to a yellowish brown with grays also occurring. | Virginia, Maryland | ||
Port Ewen Chert |
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Ranges in color from a dark gray to black | New York, Maryland, New Jersey, Pennsylvania, Virginia, West Virginia, Vermont, Massachusetts, Connecticut | Port Ewen Formation of the Helderberg Group |
Poteet Chert |
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Ranges from a dark olive gray to olive black. | Virginia, Kentucky, Tennessee | Poteet Limestone Formation |
Quartz |
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Milky white with thin veins |
North America | ||
Quartzite |
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Varies from white to gray, or pink and tan in color | North America | ||
Rhyolite |
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Gray to grayish black, flow banding may be present alternating from light to darker gray | Eastern North America | ||
Rich Patch Chert |
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Primarily a light to dark gray, but white to pink, cream, brown and grayish browns occur. | Virginia | |
Ridgely Quartzite |
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Ranges from white to a light tan or a medium gray or pink. | West Virginia, Maryland, Virginia | Ridgely Sandstone Member of the Oriskany Formation | |
Rockdale Run Chert |
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Ranges from a light to medium gray. |
West Virginia, Virginia, Maryland, Pennsylvania | Rockdale Run Limestone Formation of the Beekmantown Group |
Rose Hill Quartzite AKA: Ferruginous Quartzite, Hematitic Sandstone |
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Ranges in color from a brownish purple to a medium purple or a blood red. | West Virginia, Virginia | Rose Hill Formation | |
Runion Agate |
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Black to brown plume agate | Virginia | ||
Savannah River Agate |
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Ranges from a light grayish brown or grayish white to a yellowish brown with vugs and mottling commonly present | Georgia, South Carolina | |
Shear Zone Chalcedony (Mylonite) |
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Ranges from a translucent white to yellow, pink, or orange and commonly has inclusions or patches of green or gray. | Virginia | ||
Shady Chert |
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Ranges from a bluish gray to a yellowish gray blue, or white with mottling commonly present. | Alabama, Georgia, Tennessee, North Carolina, Virginia | Shady Dolomite Formation |
Shiver Chert |
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Ranges in color from a medium gray to black | New York, New Jersey, Maryland, and Virginia | Shiver Formation of the Helderberg Group |
Sideling Hill Chert |
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Ranges from a grayish blue to a medium to dark gray or white. Streaking or banding may be present. | Virginia | Probably New Creek Limestone Formation (Coeymans Formation). |
Sinks Grove Chert Greenbreir Chert variation |
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Black weathering gray. | Virginia | Sinks Grove Limestone Member of the Greenbrier Limestone Formation |
Skidmore Island Chert |
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Homogenous and ranges from a white to a cream or light tan | Virginia | Unknown formation |
Spring Branch Rhyolite AKA: Cypress Creek Rhyolite |
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Light bluish gray but may vary to a tan with abundant small pyrite or feldspar crystals. | South Carolina | Persimmon Fork Formation | |
Stonehenge Chert AKA: Stonehenge - Chepultepec Chert |
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Ranges from a dark gray to black. | West Virginia, Virginia, Maryland, Pennsylvania, New Jersey | Stonehenge Limestone Formation of the Beekmantown Group |
Sugarloaf Mountain Quartzite |
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White | Maryland | Sugarloaf Mountain Quartzite Formation | |
Suwannee Chert (Coastal Chert) |
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Ranges from brown to a creamy tan with dark gray, black, and bluish white with chalcedony, mottling, or banding may occur. | Georgia, Florida, Alabama, South Carolina | Suwannee Limestone Formation, Vicksburg Group |
Ten Mile Creek Chert |
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Ranges in color from a dark brownish gray to an olive gray or bluish gray. | Ohio, Pennsylvania, West Virginia | Greene Formation |
Tomstown Chert |
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Ranges from beds of bluish gray to a yellowish gray blue, or white with mottling commonly present and nodules of white. | Pennsylvania, Maryland, Virginia, and West Virginia | Tomstown Dolomite Formation |
Trading Run Chert |
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Light color ranging from a mottled white to gray, cream to yellow, and pinks with iron staining commonly present. | West Virginia, Virginia, Maryland | Helderberg Formation |
Tuscarora Quartzite AKA: Massanutten Quartzite |
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White and gray | West Virginia, Maryland, Pennsylvania, Virginia | Tuscarora Quartzite Formation of the Judy Gap Group | |
Tusquitee Quartzite |
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Ranges from a white to a light yellowish gray. | North Carolina | Tusquitee Quartzite Member of the Nantahala Formation | |
Unakite |
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Mottled green and pink | Tennessee , North Carolina, Virginia, New Jersey | ||
Uniontown Chert AKA: Waynesburg Chert |
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Ranges from light to medium gray or yellowish brown with yellow streaks. | West Virginia, Maryland | Uniontown Formation of the Monongahela Group. |
Virginia Beach Jasper |
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Ranges from a brownish yellow to a light yellowish tan, gray, or red. | Virginia | Tabb Formation | |
Waynesboro Chert AKA: Rome Chert |
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Ranges from a very dark gray to black | Virginia, West Virginia, and Maryland | Waynesboro Limestone Formation (Rome Limestone Formation) |
Weverton Quartzite |
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Feldspathic and ranges from a grayish white to medium light gray. | Maryland, West Virginia, Virginia | Buzzard Knob Member of the Weverton Quartzite Formation, Chilhowee Group | |
Wissahickon Quartzite / Vein Quartz |
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gray quartzite with milky white veins of quartz. | Pennsylvania, New Jersey, Maryland, Delaware | Wissahickon Formation | |
Wolf Den Mountain Rhyolite |
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Ranges from a medium to dark gray with white speckles. | South Carolina, North Carolina | ||
Woodway Chert |
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Ranges from a dark gray to olive black. | Virginia | Woodway Limestone Formation |
Wyboo Chert |
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Mottled with colors of white to light tan or yellow. | South Carolina |