Color: Tecovas Jasper comes in colors ranging from variegated or mottled red, blue, purple, brown, cream, and white with quartz filled vugs commonly present.

Texture:  Fine grain

Luster: Dull to virtuous

Translucency:  Opaque

Silica Fabrics / Fossils: 

Patina:

Heat Treatment: 

Knapping:

Notes:  There are many overlapping characteristics between Alibates Agatized Dolomite and Tecovas Jasper.  Agate is generally translucent to semi translucent (most or all light will pass through) and banded while Jasper is obscure to occlusive (little or no light will pass through) and mottled rather than banded.  The two may be visually distinguished by the quartz vugs seen in Tecovas Jasper.
 

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Tecovas Jasper is associated with the Triassic Tecovas Formation of the Dockum Group of eastern Caprock Escarpment of the Llano Estacado, primarily found as lenses and boulders near Quitaque, Briscoe County, Texas and throughout Briscoe and  Motley counties, but also found in the northwestern, northern, and eastern edges of the Llano Estacado including the Canadian River Valley.