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.	Northwestern New Jersey	Allentown Formation
Allentown Quartzite				Ranges from a very light gray to a medium light gray.	Northwestern New Jersey	Allentown Formation
Alsen Chert				Mottled dark gray to a dark brownish gray.	New Jersey	Alsen Cherty Limestone Formation of the Helderberg Group
Antietam Quartzite AKA: Erwin-Antietam Quartzite				Ranges from bright white to light gray, tan, brown, pink, or red, a greenish brown variation is reported	Southern  New Jersey	Antietam Formation of the Chilhowee Group
Aquia Orthoquartzite				Ranges from white to tan, light gray, or brown.  Finer grain can range from tan to brown, gray, yellow, or red.	Southern  New Jersey	Aquia Quartzite Formation
Argillite (Generic type)				Light to dark green, but may range to various shades of gray.	North America	Varies
Beacon Hill Gravel Chert / Quartzite				Nodules of chert and yellow quartzite.	Central  New Jersey	Beacon Hill Formation
Beaver Run Chert				Dolomite is a sparkly black which emits a fetid odor when struck with black and knotted chert occur.	Northern  New Jersey	Beaver Run Dolomite Member of the Ontelaunee Formation
Becraft Chert				Light bluish gray to medium gray or black	New Jersey	Becraft Limestone Formation of the Helderberg Group
Beekmantown Chert AKA: Narrows Chert				Dark gray often fossiliferous.	New Jersey	Beekmantown Geological Group
Branchville Chert				Medium to dark gray weathering a reddish brown to buff.	Northern  New Jersey	Branchville Member of the Epler Formation, Beekmantown Group
Briarcliff Chert				Light with darker patches.	Northern  New Jersey	Briarcliff Dolomite Formation of the Wappinger Group
Brandywine Blue Gneiss AKA: Wilmington Blue Rock				Ranges from a bright blue to a bluish gray.	Southern New Jersey	Brandywine Blue Gneiss Formation of the Wilmington Complex
Broad Run Chalcedony AKA: Wissahickon Schist				Ranges in color from a mottled white to light gray or cream to yellow.  Black specks are present through the material.	Southern  New Jersey	Wissahickon Formation
Brunswick Mudstone / Siltstone				Primarily a dark red, but colors of purple, green, yellow, gray, and black also occur.	Central  New Jersey	Passaic Formation (formerly Brunswick Formation) of the Newark Group
Buttermilk Falls Chert				Ranges from a dark gray to black.	Northern  New Jersey	Buttermilk Falls Member of the Onondaga Limestone Formation
Califon Chert				Ranges in color from black to gray or bluish gray or orange to brown and typically stained green from limonite.	Northern  New Jersey	Califon Member of the Leithsville Formation
Cecil Black Chert AKA: Newark Chert				Ranges from a medium gray to black	Southern  New Jersey	Newark Gabbro Formation
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.	New Jersey	Coeymans Limestone Formation (New Creek Formation), Helderberg Group
Cohansey Orthoquartzite				Base color of grayish white with mottled colors including yellow to brown, orange to red, or black	Southern New Jersey	Cohansey Formation
Crystal Quartz				clear colorless stone similar to clear glass	Eastern North America
Cuesta Quartzite				Ranges in color from pale grayish brown, pink, or reddish.	Southern New Jersey
Epler Chert / Dolomite				Ranges from a medium to dark gray.	Northern New Jersey	Epler Formation of the Beekmantown Group
Esopus Chert / Silicified Shale AKA: Cherry Valley Chert, Bowmanstown Chert				Ranges from a dark gray or brown to a brownish black or black.	Northern New Jersey	Esopus Member of the Onondaga Limestone Formation.
Gettysburg Siltstone AKA: Hammer Creek Siltstone				Ranges from a reddish brown to maroon	Northern New Jersey	Gettysburg Formation (Hammer Creek Formation) of the Newark Group
Glenerie Chert AKA: Port Jervis Chert				Ranges from a bluish gray to black weathering brown.	Northern New Jersey	Glenerie Formation of the Onondaga Group
Hamburg Chert				Ranges in color from blue to black with white quartz veins running through the material.	Northern New Jersey	Hamburg Member of the Leithsville Formation
Hardyston Chalcedony				Semi translucent milky white to light blue or light to gray.	New Jersey	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.	New Jersey	Hardyston Formation
Hardyston Quartzite				Ranges from a milky white to light blue to a light yellowish brown or gray.	New Jersey	Hardyston Formation
Harmonyvale Chert				Ranges from a gray to a greenish gray	Northern New Jersey	Harmonyvale Member of the Ontelaunee Formation
Helderberg Chert				Ranges from mottled white to light cream, light gray, and light blue commonly mottled and fossiliferous.	New Jersey	Helderberg Group
Hook Mountain Basalt AKA: Watchung Basalt				Ranges from a light to dark greenish gray amygdaloidal basalt.	Northern New Jersey	Hook Mountain Basalt Formation of the Brunswick Group
Kalkberg Chert				Ranges in color from a grayish blue to a black.  This chert is heavily cloudy by opaque patches.  Clastic quartz is present	New Jersey	Kalkberg Formation of the Helderberg Group
Kittatiny Chert				Ranges from a mottled light grayish brown to a dark grayish black with veinlets of light gray chalcedony.	Northern New Jersey	Kittatiny Formation
Kittery Quartzite AKA: Cape Elizabeth Quartzite				Ranges from a light brown to light gray.	Northeastern New Jersey	Kittery Formation of the Merrimack Group
Lafayette Chert				Ranges from a dark gray to black weathering an orangish gray	Northern New Jersey	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.	Northern New Jersey	Leithville Formation
Limeport Chert				Ranges from a gray to a bluish gray or black, banding may be present.	Southwestern New Jersey	Limeport Member of the Allentown 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	New Jersey	Lockatong Formation, Newark Group
New Scotland Chert AKA: Corriganville Chert, Minisink Chert				Ranges from a white to very light colors.	New Jersey	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.	Northern New Jersey	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 Jersey	Onondaga Limestone Formation
Ontelaunee Chert / Dolomite				Ranges from a dark gray to black.  White chert also occurs.	Northern New Jersey	Ontelaunee Formation of the Beekmantown Group
Oriskany Solicified Sandstone				White	Western New Jersey	Oriskany Sandstone Formation
Orthoquartzite (Generic type)				Varies	North America	Varies
Port Ewen Chert				Ranges in color from a dark gray to black	New Jersey	Port Ewen Formation of the Helderberg Group
Potsdam Quartzite Quartzitic sandsandstone				Ranges from a tan or cream to pink and rarely is almost black	Northern New Jersey	Potsdam Sandstone Formation of the Saratoga Springs Group
Quartz				Milky white with thin veins	North America
Quartzite				Varies from white to gray, or pink and tan in color	North America
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	Northern New Jersey	Rickenbach Dolomite Formation of the Beekmantown Group
Schoharie Chert AKA: Aquetuck Chert				Homogenous yellowish brown to a very dark gray.	Northern New Jersey	Schoharie Member of the Onondaga Limestone Formation
Sterling Hill Sussexite				Ranges from pink to a pinkish violet or red with yellow or violet occurring with reduced frequency.	Northern New Jersey
Stirling Carnelian				Translucent and varies in shades from reddish brown to reddish orange.	Northern New Jersey	Watchung Series basalt formations
Unakite				Mottled green and pink	Tennessee , North Carolina, Virginia, New Jersey
Wallkill Chert				Ranges in color from black to bluish gray or light gray	Northern New Jersey	Wallkill Member of the Leithsville Formation
Wissahickon Quartzite / Vein Quartz				gray quartzite with milky white veins of quartz.	Southern New Jersey	Wissahickon Formation