Name	Natural	Non-heat treated points	Heat treated points	Color details	Primary found in:	Associated Formation / Member
Allentown Chert				Ranges from a medium to dark gray with white streamers with banding commonly present.  Oolitic and stromatolitic.	Southeastern New York	Allentown Formation
Allentown Quartzite				Ranges from a very light gray to a medium light gray.	Southeastern New York	Allentown Formation
Alsen Chert				Mottled dark gray to a dark brownish gray.	Southeastern New York	Alsen Cherty Limestone Formation of the Helderberg Group
Amabel Formation Chert				White lacking luster	Northwestern New York	Amabel Dolomite Formation
Ancaster Chert AKA: Lockport Chert and Goat Island Chert				Mottle light to medium gray with inclusions of lighter quartz.  Commonly rusty stains.	Northwestern New York	Goat Island Member of the Lockport Formation
Argillite (Generic type)				Light to dark green, but may range to various shades of gray.	North America	Varies
Barker Quartzite				Light green when freshly fractured and weathers to a light or white color	Northeastern New York	Barker Quartzite Formation
Beaver Run Chert				Dolomite is a sparkly black which emits a fetid odor when struck with black and knotted chert occur.	Southeastern New York	Beaver Run Dolomite Member of the Ontelaunee Formation
Becraft Chert				Light bluish gray to medium gray or black	Southeastern New York	Becraft Limestone Formation of the Helderberg Group
Beekmantown Chert AKA: Narrows Chert				Dark gray often fossiliferous.	New York	Beekmantown Geological Group
Bois Blanc Formation Chert				Color ranging from almost white to grays, browns, and blues	Northwestern New York	Bois Blanc Formation Limestone
Branchville Chert				Medium to dark gray weathering a reddish brown to buff.	Southeastern New York	Branchville Member of the Epler Formation, Beekmantown Group
Briarcliff Chert				Light with darker patches.	Southeastern New York	Briarcliff Dolomite Formation of the Wappinger Group
Brunswick Mudstone / Siltstone				Primarily a dark red, but colors of purple, green, yellow, gray, and black also occur.	Southeastern New York	Passaic Formation (formerly Brunswick Formation) of the Newark Group
Buttermilk Falls Chert				Ranges from a dark gray to black.	Southeastern New York	Buttermilk Falls Member of the Onondaga Limestone Formation
Cabot Head Chert AKA: Bruce Chert				Ranges in color from shades of white to a light gray.	Northwestern New York	Cabot Head Member of the Cataract Formation
Califon Chert				Ranges in color from black to gray or bluish gray or orange to brown and typically stained green from limonite.	Southeastern New York	Califon Member of the Leithsville Formation
Chaumont Chert AKA: Watertown Chert, Leray Chert				Ranges from a dark gray to black.	Central New York	Watertown Member of the Chaumont Limestone Formation
Cherry Valley Silicified Shale				Ranges from a medium gray to a sooty black	Central New York	Cherry Valley Shale Member of the Marcellus Formation of New York
Cheshire Quartzite AKA: Stissing Quartzite				Ranges from a white to a light gray or a tannish gray	Northeastern New York
Coeymans Chert AKA: New Creek Chert				ranges in color from a bluish black to black.  Cloudy patches of fine pyrite and quartz may be present.	Southeastern New York	Coeymans Limestone Formation (New Creek Formation), Helderberg Group
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	Western New York	Upper Mercer Limestone of the Pottsville Formation
Coxsacki Chert				Ranges from a mottled grayish green to a dark green gray	Southeastern New York
Crown Point Chert				Dark bluish black	Northeastern New York	Crown Point Limestone Formation of the Chazy Group
Crystal Quartz				clear colorless stone similar to clear glass	Eastern North America
Cutting Chert AKA: Thompson's Point Chert				Ranges from dark gray to black	East central New York	Cutting Dolomite Formation of the Beekmantown Group
Eagle Bridge Quartzite				Compact gray color	East central New York	Eagle Bridge Quartzite Formation
Edgecliff Chert AKA: Clarence Chert				Mottled black, gray, and white with black spots	New York	Edgecliff member of the Onondaga Formation
Epler Chert / Dolomite				Ranges from a medium to dark gray.	Southeastern New York	Epler Formation of the Beekmantown Group
Eramosa Chert				Ranges from light to medium gray or brown gray	Northwestern New York	Goat Island Member of the Lockaport Formation
Esopus Chert / Silicified Shale AKA: Cherry Valley Chert, Bowmanstown Chert				Ranges from a dark gray or brown to a brownish black or black.	Southeastern New York	Esopus Member of the Onondaga Limestone Formation.
Flint Ridge Chert /Chalcedony AKA: Van Port, Raccoon Creek Chert				White to bluish hues with bands of light gray, reds, and yellows	Western New York	Van Port Member of the Allegheny Formation
Fort Ann Chert				homogenous dark gray to bluish gray or black.	East central New York	Fort Ann Formation of the Beekmantown Group
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	Northwestern New York	Fossil Hill Limestone Formation
Gailor Chert				Gray	East central New York	Gailor Dolomite Formation of the Beekmantown Group
Gettysburg Siltstone AKA: Hammer Creek Siltstone				Ranges from a reddish brown to maroon	Southeastern New York	Gettysburg Formation (Hammer Creek Formation) of the Newark Group
Glenerie Chert AKA: Port Jervis Chert				Ranges from a bluish gray to black weathering brown.	Southeastern New York	Glenerie Formation of the Onondaga Group
Gull River Chert (Upper) AKA: Trent Valley Chert				Ranges from black or blackish blue with lenticular cream or light tan mottling	Northwestern New York	Gull River Limestone Formation
Halcyon Lake Chert				Ranges from white to yellow or cream.	Southeastern New York	Halcyon Lake Formation of the Wappinger Group
Haldimand Chert Bois Blanc Variant				Ranges from a light gray to a light tan cream color	Northwestern New York	Bois Blanc Formation
Hamburg Chert				Ranges in color from blue to black with white quartz veins running through the material.	Southeastern New York	Hamburg Member of the Leithsville Formation
Hardyston Chalcedony				Semi translucent milky white to light blue or light to gray.	Southeastern New York	Hardyston Formation
Hardyston Jasper AKA: Berks Jasper, Lehigh Jasper, Pennsylvania Jasper, Reading Prong Jasper				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.	Southeastern New York	Hardyston Formation
Hardyston Quartzite				Ranges from a milky white to light blue to a light yellowish brown or gray.	Southeastern New York	Hardyston Formation
Harmonyvale Chert				Ranges from a gray to a greenish gray	Southeastern New York	Harmonyvale Member of the Ontelaunee Formation
Hathaway Chert AKA: St. Albans Chert				Ranges from a homogenous olive green to black or a  olive green with black mottling.	Northeastern New York	Hathaway Formation
Helderberg Chert				Ranges from mottled white to light cream, light gray, and light blue commonly mottled and fossiliferous.	New York	Helderberg Group
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	Northeastern New York	Fontenac Axis Member of the Gull River Formation
Indian River Chert				Red and bluish black weathering white.	East central New York	Indian River Slate Formation
Indian River Slate				Variegated deep maroon and bluish green.	East central New York	Indian River Slate Formation
Kalkberg Chert				Ranges in color from a grayish blue to a black.  This chert is heavily cloudy by opaque patches.  Clastic quartz is present	Southeastern New York	Kalkberg Formation of the Helderberg Group
Kettle Point Chert AKA: Ausabel Chert, Port Franks Chert / Chalcedony				Ranges from a mottled blue gray to a medium gray with darker grayish banding, lighter clouds or streaks are present	Western New York	Ipperwash Formation Limestone
Kichispi Chert Upper Gull River variant				Continuously banded chert ranging in color from a brownish grey or greyish beige.	Northeastern New York	Upper Gull River Formation
Kittatiny Chert				Ranges from a mottled light grayish brown to a dark grayish black with veinlets of light gray chalcedony.	Southeastern New York	Kittatiny Formation
Kittery Quartzite AKA: Cape Elizabeth Quartzite				Ranges from a light brown to light gray.	Southeastern New York	Kittery Formation of the Merrimack Group
Lafayette Chert				Ranges from a dark gray to black weathering an orangish gray	Southeastern New York	Lafayette Member of the Epler Formation, Beekmantown Group
Leithville Chert				Ranges in color from black to gray or bluish gray or orange to brown.  white quartz veins or staining of green limonite may be present.	Southeastern New York	Leithville Formation
Little Falls Chert AKA: Knauderack Chert				Most commonly blue, but dark brown to a pearly light blue or small bluish green speckles and milky white.  Red jasper also occurs.	Central New York	Little Falls Dolomite Formation
Lockatong Argillite				Primarily a light to dark gray, greenish gray, or black, but a greenish red, grayish purple, or reddish brown may also occur	Southeastern New York	Lockatong Formation, Newark Group
Lockport Chert AKA: Ancaster Chert, Goat Island Chert				Ranges in color from white to a very light white gray	Northwestern New York	Goat Island Member of the Lockport Formation
Lowville Chert AKA: Birdseye Chert				Ranges from a dark gray to black.	Northern New York	Lowville Limestone Formation of the Black River Group
Mistassini Quartzite AKA: Albanel Quartzite				Ranges from a bright white to light gray with medium to dark gray or black streaks or inclusions.	Northeastern New York	Temiscamie Formation of the Mistassini Group
Monkton Quartzite				Ranges from white to light buff on top layers to light shaded of red and pink to brick red or purple.  Red jasper also occurs	Northeastern New York	Monkton Formation
Mount Merino Chert AKA: Athens Hills Chert, Pleasentdale Chert, West Athens Hill Chert				Ranges in color from a dark greenish grey to a dark gray or black.	East central New York	Mount Merino Formation of the Normanskill group
Nellie Blue Chert (Upper Mercer Chert variant)				Gray to medium blue and commonly has white streaks	Western New York	Upper Mercer Limestone of the Pottsville group
New Scotland Chert AKA: Corriganville Chert, Minisink Chert				Ranges from a white to very light colors.	New York	New Scotland Formation (Corriganville Formation) of the Helderberg Group
Normanskill Chert AKA: Deepkill Chert, Coxsackie Chert				Range from a light green to a dark green or brownish green with darker bands being present.	Eastern New York	Mount Merino and Indian River Formations of the Normanskill Group
Onondaga Chert AKA: See page				Vary from light to dark gray to a mottled bluish gray to a dark brown or black or tan.	New York	Onondaga Limestone Formation
Ontelaunee Chert / Dolomite				Ranges from a dark gray to black.  White chert also occurs.	Northeastern New York	Ontelaunee Formation of the Beekmantown Group
Oriskany Solicified Sandstone				White	Southern New York	Oriskany Sandstone Formation
Orthoquartzite (Generic type)				Varies	North America	Varies
Pine Plains Chert				Ranges from a buff to light brown or tan weathering gray.	Southeastern New York	Pine Plains Formation of the Wappinger Group
Port Ewen Chert				Ranges in color from a dark gray to black	Southeastern New York	Port Ewen Formation of the Helderberg Group
Potsdam Quartzite Quartzitic sandsandstone				Ranges from a tan or cream to pink and rarely is almost black	Southeastern New York	Potsdam Sandstone Formation of the Saratoga Springs Group
Poughquag Quartzite				Dark bluish gray	Southeastern New York	Poughquag Quartzite Formation of the Wappinger Group
Poultney Chert AKA: Deepkill Chert				Ranges from white to a light gray.	East central New York	Poultney Slate Formation, Beekmantown Group
Providence Island Chert				Relatively equal amounts of white chert nodules and a dark bluish gray nodules.	Northeastern New York	Providence Island Dolomite Formation of the Beekmantown Group
Quartz				Milky white with thin veins	North America
Quartzite				Varies from white to gray, or pink and tan in color	North America
Reynales Chert / Silicified Sandstone AKA: Hickory Corners Chert				Varies in color from a white to light or medium gray or a bluish gray.	Northwestern New York	Reynales formation
Rhyolite				Gray to grayish black, flow banding may be present alternating from light to darker gray	North America
Rickenbach Chert AKA: Crooked Swamp Chert				Dark gray	Southeastern New York	Rickenbach Dolomite Formation of the Beekmantown Group
Saugeen Chert Bois Blanc variation				Color ranging from very light almost white with light blue patches.	Northwestern New York	Bois Blanc Formation
Schoharie Chert AKA: Aquetuck Chert				Homogenous yellowish brown to a very dark gray.	Southeastern New York	Schoharie Member of the Onondaga Limestone Formation
Seneca Chert AKA: Moorehouse Chert				Medium gray weathering to light colors.	Northwestern New York	Seneca Member of the Onondaga Limestone Formation
Shequindah Quartzite AKA: Kikkarney Quartzite, Munising Quartzite				Ranges in color from a white to a light gray and has light rose color staining.	Northwestern New York	Bar River Formation
Snake Hill Chert				Ranges from a dark greenish gray to black	Southeastern New York	Snake Hill Shale Formation
Stissing Chert				Ranges from white to yellow or black.	Southeastern New York	Stissing Dolomite Formation of the Wappinger Group
Ticonderoga Chert AKA: Clarendon Springs Chert, Mount Independence Chert				Dark bluish black with visible phenocrysts of calcite and pyrite inclusions.	Northeastern New York	Ticonderoga Dolomite Formation, Beekmantown Group
Upper Mercer Chert				Ranges in color from a medium gray to black	Western New York	Upper Mercer Limestone of the Pottsville group
Whitehall Chert AKA:  Mount Independence Chert				Ranges from a dark gray to a bluish black.	Northeastern New York	Whitehall Formation of the Beekmantown Group
Zaleski Chert Upper Mercer Chert variation AKA: Black Flint				Glossy black and commonly has white streaks	Western New York	Zaleski member of the Allegheny Formation