Name	Natural	Non-heat treated points	Heat treated points	Color details	Primary found in:	Associated Formation / Member
Amabel Formation Chert				White lacking luster	Eastern Michigan	Middle Silurian Amabel Formation
Ancaster Chert AKA: Lockport Chert and Goat Island Chert				Mottle light to medium gray with inclusions of lighter quartz.  Commonly rusty stains.	Northeastern Michigan	Lockport Formation
Anvil Ferruginous Chert				Ranges from a dark gray to a greenish gray or reddish brown.  Dark reddish brown or black inclusion are commonly present.	Northwestern Michigan	Anvil Ferruginous Chert Member of the Ironwood Iron Formation
Argillite				Light to dark green, but may range to various shades of gray.	Michigan
Barron County Pipestone				Ranges in color from a homogenous pink to red.	Michigan Peninsula
Bayport Chert				Varies from light brown to a medium gray.  White quartz inclusions can form white clouds or bulls eye forms in the material, Banding may be present.	Michigan	Bayport Limestone formation
Bessemer Quartzite					Michigan Peninsula	"Nopeming formation", Puckwunge formation, Osier Group
Blair Creek Basalt				Dark gray in color	Michigan Peninsula	Blair Creek formation, Menominee Group
Bois Blanc Formation Chert				Color ranging from almost white to grays, browns, and blues	Northeastern Michigan	Bois Blanc Formation Limestone
Cabot Head Chert AKA: Bruce Chert				Ranges in color from shades of white to a light gray.	Ontario, Michigan, Indiana, New York	Cabot Head Member of the Cataract Formation
Cedarville - Guelph Chert AKA: Shawnee Chert				Primarily a mottled white to light gray or light blue  numerous fossils giving a  speckled appearance with vugs or quartz present	Southern Michigan	Cedarville-Guelph formation
Colborne Chert Bois Blanc Variant				Light bluish grey color	Northern Michigan	Bois Blanc Formation
Collingwood Chert Fossil Hill variation				Ranges from white to an off white or cream color	Northern Michigan	Fossil Hill Formation
Columbus Chert				Ranges in color from a white to a light gray	Extreme southeastern Michigan	Columbus Limestone Formation
Cordell Chert				Opaque dark to light brown or light to medium gray with cream colored rod shaped fossils are usually present	Northern Michigan	Cordell formation
Corning Creek Chert				Ranges from gray to pink	Northern Michigan	Corning Creek Zone of the Negaunee Formation
Coshocton Chert Upper Mercer Chert variation				Ranges from a medium gray to a dark bluish gray with bands of various shades of blue, commonly has bands of white quartz	Southeastern Michigan	Pottsville formation
Crystal Quartz				clear colorless stone similar to clear glass	Michigan
Deerlick Creek Chert				Ranges from a mottled light gray to a very dark gray, light bluish gray to a darker blue may occur, quartz or chalcedony inclusions may be present.	Southwestern Michigan
Detour Chert Fossil Hill variation				Ranges in color from a bluish gray to a dark brown.  White circular inclusions are present in this chert	Northern Michigan	Fossil Hill Formation
Flint Ridge Chert /Chalcedony AKA: Van Port Chert, Raccoon Creek Chert				White to bluish hues with bands of light gray, reds, and yellows	Southeastern Michigan	Van Port Member of the Allegheny Formation
Fossil Hill Chert AKA: White Chert				Ranges in color from off white to bluish white.  Hues include red, pink, yellow and green.  Speckled with oxides and quartz	Eastern Michigan	Fossil Hill Formation Limestone
Gordon Lake Chert				Ranges in color from a light greenish gray to a darker green chert or quartzite	Michigan Peninsula	Gordon Lake Formation
Haldimand Chert Bois Blanc Variant				Ranges from a light gray to a light tan cream color	Northern Michigan	Bois Blanc Formation
Huronia Chert AKA: Lower Gull River Chert				Bluish gray mottled or banded chert with brownish-grey or greyish-beige colors.  Chert is commonly speckled with light/dark grey, or grey-black	Eastern Michigan	Fontenac Axis member of the Gull River formation
Huronian Jasper AKA: St. Joseph Island and  Drummond Island Puddingstone, Michigan Puddings					Northern Michigan	Lorrain formation of the Colbalt Group of Ontario
Jacobsville Sandstone AKA: Redstone, Brown Stone, Lake Superior Sandstone, Eastern Sandstone				Ranges in color from a red or brown with mottling of pinks, browns, and whites.	Northern Michigan	Jacobsville formation
Jasper Knob Chert				Ranges from white to gray	Northern Michigan	Jasper Knob Member of the Negaunee Formation
Lake Superior Agate				Range in color from a light to dark salmon or coral color with alternating bands of white or light yellow.  Colorless inclusions of quartz are often present.	Michigan Peninsula	Nebraska - Archean System
Lambrix Chert				Ranges in color from a sandy brown, pale brawn, or dark brown with the brownish coloration grading from a gray to light gray	East central Michigan	Glacial till
Lockport Chert				Ranges in color from white to a very light white gray	Northeastern Michigan	Goat Island member of the Lockport Formation
Logan County Chert Cedarville-Guelph variation				Ranges in color from a light, dull gray to dull pink. Usually it is speckled with a darker gray	Southern Michigan	Cedarville-Guelph formation
Mesnard Quartzite AKA: Mount Mesnard Quartzite				Ranges in color from a a light gray to shades of pink and light red.  Weathers to white.	Michigan Peninsula	Algonkian Formation, Chocolay Group, Animikie Series
Nellie Blue Chert (Upper Mercer Chert variant)				Gray to medium blue and commonly has white streaks	Southeastern Michigan	Upper Mercer Limestone of the Pottsville group
Nethers Chert Flint Ridge Chert variation AKA: Ribbon Chert				Banded with colors ranging from light gray to black, pink to red, or tan to brown	Northeastern Michigan	Van Port Member of the Allegheny Formation
Norwood Chert AKA: Eastport Chert				Opaque and ranges in color from a light to medium gray.  Darker or lighter banding is commonly present, may have darker gray patches present.	Northern Michigan	Petoskey Formation
Olive Chert				Homogenous light to medium olive gray may vary from opaque to a semi-translucent.	Southwestern Michigan	Glacial till
Oneota Chert AKA: Oneota Prairie de Chein Chert (lower)				Ranges from white to gray or yellowish or orange	Michigan Peninsula	Lower Prairie de Chien Group,  Oneota formation
Onondaga Chert AKA: Buttermilk Falls, Black Rock, Clarence, Coniferous, Diver's Lake, Edgecliff, Moore House, Nedrow, Seneca, Fort Erie Chert				Vary from light to dark gray to a mottled bluish gray to a dark brown or black or tan.	Michigan	Onondaga Limestone Formation
Orthoquartzite				Varies	Michigan
Petoskey Stone AKA: Agatized Coral				Ranges in color from the most grays to olive greens and pinks	Northern Michigan	Gravel Point formation of the Traverse Group
Pipe Creek Chert AKA: Perkins, Plum Brook, Brook Chert				Ranges from gray to bluish gray or a pale brown, may be mottled or homogenous, light blue cloudy and quartz lined vugs may be present	Southeastern Michigan	Tenmile Creek Formation
Portage Lake Rhyolite AKA: Portage Lake Quartzite				Varying shades of red with conglomerate or copper inclusions being present.	Michigan Peninsula
Quartz				Milky white with thin veins	Michigan
Quartzite				Varies from white to gray, or pink and tan in color	Michigan
Racine Chert AKA: Engadine Chert				Ranges from a grayish white to a medium gray or bluish gray.  Mottling or streaks of bluish tints may be present	Wisconsin, Illinois	Racine Limestone Formation
Rhyolite				Gray to grayish black, flow banding may be present alternating from light to darker gray	Michigan
Rossport Chert				Opaque and black in color	Michigan Peninsula	Gunflint Formation, Animikian Group
Prout Chert				Ranges in color from a cream to a tan, light gray to a dark gray or blue.	Southeastern Michigan	Prout Dolomite Formation
Saugeen Chert Bois Blanc variation				Color ranging from very light almost white	Northern Michigan	Bois Blanc Formation
Selkirk Chert AKA: Dundee Chert				Range in color from light gray to yellowish gray, dark gray, , black or brown.  White to light gray bands or clouds are present	Northern Michigan	Dundee Limestone Formation
Silurian Chert				Mottled or streaked chert ranging in color from white to a light cream or light gray	Michigan Peninsula	Mayville Limestone / Dolomite Formation
Sturgeon Quartzite				Light gray	Northeastern Michigan	Sturgeon Quartzite Formation
Thunder Mountain Quartzite AKA: McCaslin QUartzite				Grayish color.  It is considered a quartz rich graywacke.	Michigan Peninsula	McCaslin syncline
Transverse Chert				Dark gray	Southeastern Michigan	Transverse Limestone formation
Tyler Argillite				Ranges from gray to dark gray in color.	Michigan Peninsula	Tyler formation, Baraga Group
Upper Mercer Chert				Ranges in color from a medium gray to black	Southeastern Michigan	Upper Mercer Limestone of the Pottsville group
Wewe Slate				Banded ranging from a gray to grayish green.	Michigan Peninsula	Chocolay Group
Zaleski Chert Upper Mercer Chert variation AKA: Black Flint				Glossy black and commonly has white streaks	Southeastern Michigan	Zaleski member of the Allegheny Formation