Name	Natural	Non-heat treated points	Heat treated points	Color details	Primary found in:	Associated             Formation / Member
1604 Chert Edwards Chert variation				Ranges from a gray to medium brown with tints of pink or light maroon commonly present.	South central Texas	Edwards Limestone Formation
Abo Sandstone				Laminated sandstone that ranges from a tan to a dark red or purple	West Texas	Abo Sandstone Formation
Agate Jasper (Generic Type)				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 Texas
Aleman Ribbon Chert				Ranges from a dark gray to white or red.  Chalcedony occurs as veins, bird eye like vugs, and fossil replacement.	Western Texas	Aleman Member of the Montoya Formation
Alibates Agatized Dolomite AKA: Alibates Flint				Primarily banded, speckles, or mottled with colors commonly ranging from red, blue, purple, brown, cream, and white.	Northern Texas	Quartermaster Formation
Allamoore Ribbon Chert					Western Texas	Allamoore Formation
Andesite Generic Type					North America	Varies
Apple Ranch Chert				Brown	Western Texas	Apple Ranch Limestone Member of the Word Formation
Argillite (Generic type)				Light to dark green, but may range to various shades of gray	North America
Balmorhea Blue Agate AKA: Toyah Agate				Ranges from a light blue gray to a dark blue gray, lavender, and white with bands of slight gray to lighter blues.	Western Texas
Bangor Agate AKA: St. Louis					Northeastern Texas
Basalt (Generic Type)				Ranges from black to gray	Western North America
Big Bend Moss Agate AKA: Big Bend Plume Agate				Matrix that ranges from white to a clear blue or carnelian with brown green, red, or orange plumes or dendritic inclusions.	Southwestern Texas
Big Bend  Petrified Wood				Shades of brown with wood grain and rings present.	Southwestern Texas
Big Bend Yellow Jasper				Commonly a mottled yellow with reds occurring.	Southwestern Texas
Brazos River Chert AKA: Brazo River Pebble Chert, Mineral Wells Chert				Most commonly light colored but green, black, yellow, and red, banding may occur.	East central Texas	Mineral Wells Formation
Brushy Creek Chert Edwards Chert variation				Slightly translucent and ranges in color from black to a dark medium gray.	East central Texas	Edwards Plateau Limestone Formation
Bug-eyed Agate				Colors of clear, white, green, blue, and pink.  Eyes. tubes, dendrites and fortifications are present.	Southwestern Texas
Burro Mesa Chert				Colors from whites to grays, grays to blue,  pinks and reds, and tan to yellow.  It can be solid, mottles, or banded.	Southwestern Texas
Butterscotch Chert				Ranges from a light brown to a dark yellowish brown.	Southwestern Texas
Caballos Novaculite AKA: Santiago Chert				Primarily white.  However, the upper and middle layers range from a banded multi color white, light green, light red, and light browns.	Western Texas	Caballos Novaculite Formation
Camp Colorado Chert				Ranges from a dark grayish black to black.	Eastern Texas	Camp Colorado Limestone Member of the Pueblo Formation
Canadian River Plume Agate				Plumes of red, black, and yellow.	Northern Texas
Cannel Coal				Ranges from a dark gray to black	Texas
Canutillo Chert AKA: Texas Oil Chert				Ranges from a mottled light brown to dark brown or black.	Western Texas	Canutillo Limestone Formation
Carnelian (Generic Type)				Translucent and varies in shades from reddish brown to reddish orange.	North America	Varies
Catahoula Petrified Wood				Includes petrified elm, oak, hickory, and palm wood and contains shades of white, brown, cream, and tan with wood grain or rings present.	Southeastern Texas	Catahoula Formation
Cienega Brown Chert				Ranges from a cream or tan to a yellowish or orangish brown.	Southwestern Texas
Chickachoc Chert				Ranges in color from a rich tan to a grayish brown or black.	Northern Texas	Chickachoc Chert Member of the Wapanucka Formation
Cowhouse Chert				Most common color is white ranging to gray or brown.  Speckles, mottled, streaking, and fossiliferous hash, novaculite and petrified wood.	East central Texas	Cowhouse gravels
Cow Plop Chert AKA: Scarborough Ranch Chert				Gray to brown	East central Texas
Dacite Generic Type				Most commonly a light to dark gray or black	Western North America	Varies
Dakota Quartzite AKA: Dakota Orthoquartzite				Ranges in color from reds to browns	Northwestern Texas	Dakota Formation
Day Creek Chert				Ranges from a mottled very light pale blue to a grayish blue or a reddish blue.  Tan and brown mottling or streaking may be present	Northwestern Texas	Day Creek dolomite of the Cloud Chief formation
Devil's River Chert AKA: Santa Elena Cahert				Ranges from a light gray to light brown and may be brecciated.	Southwestern Texas	Devils River Limestone Formation
Dimple Hills Chert				Black	Southwestern Texas	Dimple Hills Limestone Formation
Edwards Plateau Chert				Ranges in color from most commonly light gray to brown or a medium gray.  May have numerous short linear fossil inclusions.	Central Texas	Edwards Limestone Formation
El Sauz Chert				Predominantly light to medium gray may exhibiting mottling of pink, red, yellow, orange, purple, green and light browns.	Southern Texas	Catahoula Formation
Ellenburger Chert				Ranges from white to a light yellow or light gray.	Central Texas	Ellenburger Limestone Formation
El Paso Chert				Ranges from a medium light gray to olive gray dolomite to a light tan to gray or olive gray with reddish or bluish streaks occasionally present.	Western Texas	El Paso Limestone Formation
Etholen Chert				Ranges from gray to a light pinkish gray, black, or dark purple with darker colors being the most common.	Western Texas	Etholen Conglomerate Formation
Evant Chert				Ranges from a whitish gray to a medium gray.  Mottling with shades of brown may be present.	Central Texas
Felsite (Generic Type)				Generally white to light gray or reddish or tan with darker speckles being present.	Texas
Fire Engine Jasper				Red	Eastern Texas	Brazos River Gravels
Florence Chert - Type A AKA: Kay County Chert, Maple City Chert				Banded or "wood grained" and ranges in color from a buff to a yellow gray.  Heat treatment produces a red color.	Northeastern Texas	Florence Limestone Member, Barnestone Formation, Permian Group
Florence Chert - Type B				Ranges in color from a steel gray to a bluish gray with lighter colored splotches or darker colored mottling.	Northeastern Texas	Florence Limestone Member, Barnestone Formation, Permian Group
Florence Chert - Type C				Homogenous gray	Northeastern Texas	Florence Limestone Member, Barnestone Formation, Permian Group
Florence Chert - Type D AKA: Flint Hills Chert				Ranges from gray to a buff with many thin bands of darker translucent material.	Northeastern Texas	Florence Limestone Member, Barnestone Formation, Permian
Fort Hood Chert Edwards Chert variation				Ranges from a brownish yellow to light to dark gray, banding or speckles may be present.	Central Texas	Edwards Limestone Formation
Fort Pena Chert				Ranges from shades of purple, red, and blue	Western Texas	Fort Pena Formation
Fusselman Dolomite / Chert				Ranges from a light gray to an olive gray or brownish gray.	Western Texas	Fusselman Dolomite Formation
Georgetown Chert AKA: Texas Tortilla Chert				Varying shades of gray.	Central Texas	Georgetown Member of the Edwards A Formation
Guadalupe River Gravel Chert				Varies in color based on the formation that the chert was originally formed, highest concentration is Edwards Chert.	Southeastern Texas	Guadalupe River Gravels
Hamilton County Chert				Ranges from a light brown to a light brownish gray or light yellowish gray, mottling may be present.	Central Texas
Heiner Lake Chert Edwards Chert variation				Ranges from a tan to a light blue or blue.	Central Texas	Edwards Limestone Formation
Lenora Park Chert				Light gray	Central Texas
Leon River Chert				Wide range of colors including shades of brown, gray, and white.	Northeastern Texas	Leon River Gravels (various formations)
Leonard Chert				Yellowish	Western Texas	Leonard Formation
Llano River Chert				Wide range of colors including shades of brown, gray, and white.	Central Texas	Llano River Gravels
Manning Fused Glass				Colors of grayish white, black, red, and purple.	Eastern Texas	Manning Formation
Maravillas Chert AKA: Maravillas Gap Chert, Canyon Chert				Ranges from a dark gray to black, fine white chalcedony veins or fine pale green banding may be present.	Southwestern Texas	Maravillas Formation
Marble Falls Chert				Ranges from a dark gray to black	Central Texas	Marble Falls Limestone Formation
Marfa Plume Agate				Transparent to translucent matrix with dense black, metallic yellow, and less frequently, white plumes.	Western Texas
McKnight Chert				Ranges from a dark gray to black.	Southwestern Texas	McKnight Formation of the Atascosa Group
Montoya Chert				Shades of pink	Western Texas	Montoya Formation
Needle Peak Agate				Mottled whitish tan to a light brown or dark yellowish brown, fortified agate, moss agate and pom pom agate also occurs.	Western Texas
Novaculite AKA: Arkansas Novaculite, Ouachita Novaculite (Generic Type)				Range from white to light gray or black	Texas	Varies
Nueces River Chert				Colors ranges from white to shades of brown or gray.	Southeastern Texas	Varies
Obsidian AKA: Volcanic Glass (Generic type)				Black to black with bands of dark reds (mahogany obsidian) or white flakes (snowflake obsidian)	Western North America	Volcanic
Ogallala Orthoquartzite AKA: Bijou Hills Silicified Sediment and Sugar Rock				Colors can vary, but most common colors are light to dark gray, tan, white, pink, maroon, or golden	Northern Texas	Ogallala Formation
Ogallala Silicified Sediment AKA: Ogallala Chert				Ranges from a buff to a reddish color or gray.  Quartz inclusions form speckles in the material.	Northern Texas	Ogallala Formation
Owl Creek Black Chert Edwards Chert variation				Ranges from a dark gray to black, small white speckles may be present.	Central Texas	Edwards Limestone Formation
Palmwood AKA: Petrified Palmwood				Ranges from white to yellowish white or cream with specks or streaks of brown to yellowish brown.	Eastern Texas	Catahoula Formation
Pedernales River Amoeba Chert AKA: Amoeba Chert, Abiquiq Chert				Ranges in color from light tan to dark brown.	Central Texas	Edwards Limestone Formation
Petrified Wood AKA: Agatized Wood, Opalized Wood				Vary in color based on the minerals present during the process	North America	Varies
Pisgah Ridge Chert AKA: Tehuacana Chert				Black with small white speckles weathering white	Northeastern Texas	Tehuacana Limestone Member of the Kincaid Formation
Pom Pom Agate				Soft green to colorless matrix with clear yellow "pom pom" inclusions.	Western Texas
Potter Chert				Mottled with shades of white, gray, blue, and yellow.	Northern Texas	Potter Member of the Ogallala Formation
Rancheria Chert				Porous ranging from gray to brown and weathering brown	Western Texas	Rancheria Formation
Ranger Chert				Brown	North central Texas	Ranger Limestone Member of the Brad Formation
Red River Jasper AKA: Kiamichi Chert				ranges from an orangish red to a greenish gray with iron pyrite inclusions commonly present.	Northeastern Texas	Possible Woodford Formation
Rhyolite (Generic Type)				Gray to grayish black, flow banding may be present alternating from light to darker gray	North America	Volcanic Activity
Rio Grande River Chert				Wide variety of colors with the most common being shades of cream, tan, and brown.  Petrified wood and quartzite also occur	Western Texas	Rio Grande river gravels.
Rio Grande Valley Wood				Shades of white, gray, brown, red, and black with wood rings and grain present.	Southwestern Texas	Goliad Formation
Root Beer Chert Edwards Chert variation				Ranges from a medium to dark brown or grayish brown and may range from homogenous to having swirls or streaking	Central Texas	Edwards Limestone Formation
Salmon Peak Chert					Southwestern Texas	Salmon Peak Formation
Santiago Chert (Caballos Novaculite)				Banded with primarily green, but dull shades of red, gray, brown, yellow, and white are also present.	Western Texas	Santiago Chert Member of the Caballos Novaculite
Stockweather Chert				Ranges from yellowish to a pale whitish yellow	Central Texas	Stockweather Limestone Member of the Pueblo Formation
Taylor Ranch Chert				Orangish brown color	Southwestern Texas	Taylor Ranch Limestone Member of the Hess Formation
Tecovas Jasper AKA: Quitague Jasper				Ranges from variegated or mottled red, blue, purple, brown, cream, and white	Northern Texas	Tecovas Formation
Tessman Ranch Wood				Colors of yellow, tan, browns, and white with rings or grains commonly present.	Southern Texas
Thistle Agate				Matrix of translucent gray or green with fine white or yellow starburst or pom poms.	Southern Texas
Thunderbird Rhyolite				Ranges from a dark purplish gray or black with brownish red inclusions to a reddish brown with dark purplish gray or black inclusions.	Western Texas	Thunderbird Formation
Tuff AKA: Solidified Volcanic Ash				Contains greater than 75 volcanic ash and ranges from white to tan, gray or pink.	North America	Volcanic activity
Uvalde Chert AKA: Twelvemile Creek Chert				Ranges from most commonly from tan to brown with white, blue, gray, and pink cherts also occurring.	Southeastern Texas	Uvalde Gravels
Van Horn Purple & Tan Chert				Ranges from a mottled pale to medium purple or a mottled light to medium tan, purplish tan or grayish orange.	Western Texas
Van Horn Spotted Chert				Ranges from a brownish red to a grayish red, pale orange, or grayish purple with spots or patches of white, or reversed colors.	Western Texas
Van Horn White Chert				Ranges from a mottled white to medium light gray or pinkish gray.	Western Texas
Vidrio Chert				Uniform dark to light gray	Western Texas	Vidrio Massive Member of the Captain Limestone Formation
Willis Chert				Great variation of color, most commonly shades of brown and tan, but may range to white to pink or black.  Petrified Wood also occurs.	Southeastern Texas	Willis Gravel Formation
Woodward Ranch Agate AKA: Alpine Agate				Includes both plume, flower, and banded agates with plumes of red and black and pink banded agate.	Southwestern Texas
Wylie Mountain Agate AKA: Van Horn Butterscotch Agate				Ranges from a mottled whitish tan to a light brown or dark yellowish brown or a mottled whitish pink to a dusty red.	Western Texas