Utah Lithic Material
Name | Natural | Non-heat treated points | Heat treated points | Color details | Primary found in: | Associated Formation / Member |
Agate Jasper (Generic Type) |
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Ranges from yellow to brown or green. Part if the material will be banded and be translucent while the remaining material will be mottled and opaque. | Western North America | ||
Ajax Chert AKA: Emerald Chert |
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Ranges from a light gray to a creamy white color | Central Utah | Emerald Dolomite Member of the Ajax Limestone Formation |
Andesite (Generic Type) |
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North America | Varies | ||
Argillite (Generic type) |
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Light to dark green, but may range to various shades of gray | North America | ||
Basalt (Generic Type) |
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Ranges from black to gray | Western North America | ||
Beaver Dam Agate / Petrified Wood |
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Primarily white with shades of orange, pink, and red. | Southwestern Utah | ||
Beaver Dam Jasper |
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Shades of red | Southwestern Utah | ||
Beaver Dam Wonderstone / Banded Rhyolite |
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Banded with colors of cream, brown, red, and yellow | Southwestern Utah | ||
Bingham Quartzite |
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Most commonly white and banding may be present | North central Utah | Bingham Quartzite Formation | |
Black Mountain Obsidian |
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Black | Southwestern Utah | ||
Black Rock Obsidian |
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Ranges from a dark gray to black with phenocyst (snowflake) and reddish brown streaking (mohagany) commonly present. | Central Utah | ||
Blue Valley Agate |
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Black with blue bands | Central Utah | ||
Bluebell Chert |
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More banded than mottled and ranges from a buff to a dusty bluish gray | North central Utah | Bluebell Limestone Formation | |
Boulder Jasper |
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Mottled with colors ranging from a yellowish brown to red. Intricate patterned swirls and speckles of translucent silica are present. | South central Utah | ||
Brianhead Chert |
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Primarily white and gray and may have areas of red and yellow. | Southwestern Utah | Brianhead Formation | |
Browns Bench
Obsidian AKA: Goose Creek, Hudson Ridge, Jackpot Obsidian |
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Black | Northwestern Utah | Bruneau / Jarbidge Volcanic Field | |
Browns Park Chert |
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Similar to chalcedony with a opaque base of white and translucent hues ranging from light yellow, light to dark gray or light brown. | Northeastern Utah | Browns Park Formation | |
Brushy Basin Chert |
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Banded, white in color with pastel shades of tan, pink, green, and orange with banded or swirls of darker shades of brown, reddish brown, or gray. | Eastern Utah | Brushy Basin Member of the Morrison Formation | |
Brushy Basin Quartzite |
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Eastern Utah | Brushy Basin Member of the Morrison Formation | ||
Bryce Canyon Petrified Wood |
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Colors of red, brown, yellow, and white. Wood grain and rings are commonly present. | Southwestern Utah | ||
Burro Canyon Chert |
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Variegated ranging from white to yellow, tan to medium brown, light to medium gray, light to medium green or shades of red | East central Utah | Upper Burro Canyon Formation |
Burro Canyon Quartzite |
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Ranges from off white to tan light gray or light green. May have mottling of darker gray. | East central Utah | Upper Burro Canyon Formation | |
Butterfield Chert |
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Black with concentric bands of dark gray. | North central Utah | Butterfield Limestone Member of the Bingham Quartzite |
Caineville Agate / Jasper / Petrified Wood |
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Colors of white, gray, green, purple, orange, and red. The jasper is red and the petrified wood is shades of brown and tan with wood grain / rings | Southeastern Utah | ||
Carnelian (Generic Type) |
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Translucent and varies in shades from reddish brown to reddish orange. | North America | Varies | |
Castro Canyon Agate |
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Red agate | Southwestern Utah | ||
Cedar Breaks Moss Agate |
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Ranges from red to yellow with black dendritic inclusions. | Southwestern Utah | ||
Cedar Canyon Agate |
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Colors of red, brown, black, and white. | Southwestern Utah | ||
Cedar Mesa Chert |
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Red and white. | Southeastern Utah | Cedar Mesa Sandstone Member of the Cutler Formation | |
Central Chalcedony |
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Gray color | Southwestern Utah | ||
Chokecherry Chert |
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Primarily dark gray to black and mottling may be present. | Northwestern Utah | Chokecherry Dolomite Formation |
Circle Cliffs Petrified Wood |
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Colors of browns, grays and black with veins and patches of white. Wood grain and rings are present. | South central Utah | ||
Cisco Agate AKA: Blood Spot Agate, Pigeons Blood Agate |
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Ranges from bright red to pink, pinkish tan, and salmon color. | East central Utah | ||
Cisco Jasper / Petrified Wood |
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Petrified Wood has colors of yellow, pink, red and bluish gray chalcedony. | East central Utah | ||
Cisco Pink Chalcedony |
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Light pink color | East central Utah | ||
Clay Point Agate / Moss Agate |
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Colors of red and purple ranging from homogenous to mottled. Moss agate has black or brown dendritic inclusions. | Southeastern Utah | ||
Cottonwood Wash Chert |
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Banded | Southeastern Utah | ||
Dacite (Generic Type) |
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Most commonly a light to dark gray or black | Western North America | Varies |
Drum Mountain Plume Agate / Moss Agate / Jasper |
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Occurs in multiple colors including red, yellow, purple, white, and brown. | East central Utah | ||
Duck Rock Jasper |
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Banded with colors of yellow, red, and brown cemented with silica. | Northeastern Utah | ||
Dugway Geodes |
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Banded bluish gray to gray with a hollow interior | West central Utah | ||
Elimia Agate AKA: Turritella Agate |
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Black to brownish gray or brownish black matrix with light gray snail shells. | Northeastern Utah | Green River Formation | |
Emmons Peak Quartzite AKA: Uinta Quartzite |
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Ranges from an off white to a red or reddish purple. | Northeastern Utah | Emmons Formation | |
Escalante Agate / Petrified Wood |
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Petrified wood has colors of yellow, brown, red, and white, wood grain and rings are commonly present. | South central Utah | ||
Eureka Agate AKA: Eureka Jasper |
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Colors of red and yellow. This material has been referred to as Eureka Jasper due to the color. | Central Utah | ||
Eureka Quartzite AKA: Standbury Quartzite |
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Ranges from dense white dark gray quartzite to a vitreous tan to brown, milky white, pink, purple, or red orthoquartzite. | Western Utah | Eureka Quartzite Formation | |
Ferguson Wash
Obsidian AKA: Dead Cedar Wash, Ferguson Flat Obsidian |
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Black | Northwestern Utah | ||
Fiddlers Canyon Moss Agate |
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Ranges from a blue with black dendritic inclusions to a multi colored with colors of white, pink, and brownish orange with dendritic inclusions. | Southwestern Utah | ||
Fish Haven Chert |
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Ranges from a grayish tan to black weathering shades of brown. | Northwestern Utah | Fish Haven Dolomite Formation |
Garden City Chert |
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Ranges from a light to dark grayish blue. Black layers of chert also occur. | Northern Utah | Garden City Limestone Formation |
Gardner Chert |
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Ranges from a gray to a dark grayish blue or black | Central Utah | Gardner Limestone Formation |
Gerster Chert |
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Ranges from a tan to a light gray or light bluish gray with a dark rusty brown cortex. Banding was reported in southern Pequop Mountains. | Northwestern Utah | Gerster Limestone Formation |
Grandeur Chert |
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Light gray | Northwestern Utah | Grandeur Limestone Formation |
Hermosa Chert |
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Has colors of red, gray and jet black. | Southeastern Utah | Hermosa Formation |
Henry Mountain Peach Agate / Petrified Wood |
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Petrified wood has colors of yellow, brown, red, white, and black with wood grain or rings commonly present. Agate is a peach color. | South central Utah | ||
Hidden Canyon Jasper |
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Banded with colors of yellow, red, and green. Mossy dendritic inclusions may be present. | Utah | ||
Indian Blanket Jasper |
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Soft subtle tones of red, purple, brown, black, yellow, and tan. | Southwestern Utah | ||
Jordan Chert |
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Black | North central Utah | Jordan Limestone Member of the Bingham Quartzite Formation |
Kiabab Chert |
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Mottled with whites, light browns, tans, and light grays with a brown cortex | Southern Utah | Kiabab Limestone Formation |
Laketown Chert |
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Light gray | Northwestern Utah | Laketown Dolomite Member of the Guilmette Formation |
Lenox Chert |
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Ranges from dark bluish black to black. | North central Utah | |
Levan Agate |
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Blue | Central Utah | ||
Levan Black Agate |
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Ranges from a dark gray to black | Central Utah | ||
Little Egypt Agate |
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Shades of red | Southeastern Utah | ||
Marysvale Obsidian |
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Black | South central Utah | Mount Belknap Volcanic Series | |
Mineral Mountain
Obsidian AKA: Pumice Mine, Wild Horse Canyon Obsidian |
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Black | Southwestern Utah | ||
Moab Agate / Chalcedony |
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Includes white agate and red agate with red fortifications, Chalcedony is bluish white. | Southeastern Utah | ||
Moab Jasper |
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Brownish yellow and red | Southeastern Utah | ||
Moab Petrified Wood |
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Shades of brown and black with wood grain and rings present. | Southeastern Utah | Cutler Formation | |
Modena Obsidian AKA: Dry Valley, Panaca Summit, Pinon Point Obsidian |
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Opaque to slightly translucent black with faint translucent gray banding commonly present. | Southwestern Utah | ||
Morgan Chert AKA: Morgan - Maddison Chert, Morgan Jasper |
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Has colors of orange to a pumpkin orange, reds, yellowish "mustard" brown to a reddish brown. | East central Utah | Morgan Formation |
Morrison Chert AKA: Brushy Basin Chert / Burro Canyon Chert |
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Commonly mottled and ranges in shaded of maroon, green, tan, and brown. | Eastern Utah | Burro Canyon Formation / Brushy Basin Member of the Morrison Formation |
Morrison - Cloverly Quartzite AKA: Morrison - Cloverly Orthoquartzite |
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Ranges from a tan to brown or purple to maroon or gray. | Eastern Utah | Morrison and Cloverly Formation | |
Morrison Mudstone |
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Commonly mottled and ranges in shaded of maroon, green, tan, and brown. | Eastern Utah | Burro Canyon Formation / Brushy Basin Member, Morrison Formation | |
Morrison Petrified Wood |
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Colors of red, yellow, purple, black, gray, brown, and white. Wood grain and rings are commonly present. | Eastern Utah | ||
Morrison Silicified Sandstone |
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Commonly mottled and ranges in shaded of maroon, green, tan, and brown. | Eastern Utah | Brushy Basin Member of the Morrison Formation | |
Murdock Mountain Chert |
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Ranges from a light gray to a bluish gray or tannish gray. | Northwestern Utah | Murdock Mountain Limestone Formation |
Newcastle Chalcedony |
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Southwestern Utah | |||
Notch Peak Chert |
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Dark colored gray | Eastern Utah | Notch Peak Formation |
Nugget Sandstone |
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Ranges from buff to pink. | Utah | Chug Water Formation of the Thrust Belt | |
Obsidian AKA: Volcanic Glass |
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Black to black with bands of dark reds (mahogany obsidian) or white flakes (snowflake obsidian) | Western North America | Volcanic | |
Old Paria Petrified Wood AKA: Paria Petrified Wood |
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Shades of gray, brown, black, white, and pink with wood grain and rings present. | South central Utah | ||
Opal Hill Opal / Chalcedony |
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Primarily milky white with black, brown, and pea green occurring | East central Utah | ||
Opal Hill Petrified Wood |
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Primarily milky white with black, brown, and pea green occurring | East central Utah | ||
Opohonga Chert |
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White | Central Utah | Opohonga Limestone Formation |
Owl Rock Chert |
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Southern Utah | Owl Rock Member of the Chinle Formation | |
Paradise Chert |
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Translucent white matrix with mottling of opaque cream to yellow or brown opaque patches. | Southern Utah | |
Petrified Wood (Generic Type) |
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Color based on the minerals present during the process. It can range from black green to blue yellow, red, and brown , pink and orange, yellow, white | Utah | Varies | ||
Phonolite Hill Obsidian |
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Primarily gray ranging to black. Flow banding may be present. | South central Utah | Marysvale Volcanic Field | |
Phosphoria Chert AKA: Tosi Chert, Big Horn Chert |
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Ranges from colors of red, maroon, purple, orangish red, green, black and white. | Northern Utah | Tosi Member of the Phosphoria Formation |
Pine Canyon Chert |
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Black | Central Utah | Pine Canyon Limestone Formation |
Plympton Chert |
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Ranges from a light milky gray to dark gray weathering brown. | Eastern Utah | Plympton Formation |
Prospect Mountain Quartzite |
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Brownish white, darker and more ferrous towards the base and lighter towards the top of the formation. | Eastern Utah | Prospect Mountain Formation | |
Red Creek Quartzite Uinta Quartzite variant |
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Very crystalline white quartzite. | Northeastern Utah | ||
Reed Argillite / Chert AKA: Reed and Benson Argillite / Chert |
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Light yellow cherty argillite | North central Utah | Reed Formation | |
Rex Chert |
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Ranges from a brownish red to purple or an ashy gray to black | Northern Utah |
Rex Chert Member, Phosphoria Limestone Formation |
Rhyolite (Generic Type) |
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Gray to grayish black, flow banding may be present alternating from light to darker gray | North America | Volcanic Activity | |
San Rafael Agate / Jasper |
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Ranges from white to red and yellow | East central Utah | Brushy Bush Member of the Morrison Formation. | |
San Rafael Petrified Wood |
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Colors of brown, black, and white with wood grain and rings present. | East central Utah | Brushy Bush Member of the Morrison Formation. | |
Septaria AKA: Oderville Agate |
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Outer edge of a dark brownish gray with an interior of a lighter brown and white. | Southwestern Utah | ||
Sheep Creek Quartzite |
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Most commonly tan to cream color with light gray occurring and less often dark gray, white or red. Banding is commonly present | Northeastern Utah | Uinta Quartzite Formation | |
Shinrump Chert |
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Ranges from gray to white. | Southeastern Utah | Shinarump Conglomerate Member of the Chinle Formation | |
Shinarump Quartzite |
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Black and red | Southeastern Utah | Shinarump Conglomerate Member of the Chinle Formation | |
Silicified Dinosaur Bone | Utah | |||||
Spor Mountain Jasper |
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Colors of yellow, orange, and gray with dendritic inclusions. | West central Utah | ||
St. John Jasper |
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Variegated jasper with colors of red, pink, white, and black. | Southwestern Utah | ||
Summerville Chert |
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Two variations. One is black chert and the other is a white or red opalitic chert. | Southeastern Utah | Summerville Formation |
Swan Peak Quartzite |
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Ranges from white to gray | Northern Utah | Swan Peak Formation | |
Thompson Agate / Jasper |
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East central Utah | |||
Tiger Chert AKA: Bridger Basin, Green River, Oil Chert, Zebra Chert, Shavetail Chert |
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Primarily dark brown with wide tan banding. If the material is smaller, the tan could be primary with the darker brown bands. | Northeastern Utah | Pine Springs Formation | |
Tintic Quartzite |
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Primarily white weathering a brownish red | North central Utah | Tintic Formation | |
Topache Chert |
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Light bluish color | Southwestern Utah | Topache Limestone Formation |
Topaz Mountain
Obsidian AKA: Thomas Range Obsidian |
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Black | West central Utah | ||
Torrey Agate / Jasper / Petrified Wood |
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Petrified wood has shades of tan and gray with wood grain and rings commonly present. | Southeastern Utah | ||
Tuff AKA: Solidified Volcanic Ash (Generic Type) |
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Contains greater than 75 volcanic ash and ranges from white to tan, gray or pink. | North America | Volcanic activity | |
Utah Wonderstone |
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Banded rhyolite with banded colors of maroon, yellow, and white. | North central Utah | ||
Watahomigi Chert AKA: Supai Chert, Watahomigi Jasper |
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Shades of medium to dark red or purple with white quartzite veins commonly present. | Southwestern Utah | Watahomigi Formation of the Supai Group | |
Wendover Moss Agate |
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White to bluish matrix with red or yellow dendritic inclusions. | Northwestern Utah | ||
White Mountain Obsidian |
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Black | Central Utah | ||
Wildcat Hills Obsidian |
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Black with phenocysts inclusions present. | North central Utah | ||
Woodman Chert |
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Ranges from a dark gray to black | Northwestern Utah | Woodman Formation |
Yellow Cat Redwood |
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Red limb casts without any trace of wood structure. | East central Utah | ||
Young Peak Chert |
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Dark gray | Northwestern Utah | Young Peak Dolomite Formation |