Color:  Hillsborough Chert ranges from tan to brown with medium to dark gray also occurring.  Chalcedony or quartz lined vugs commonly present. 

Texture:  Fine grain

Luster:

Translucency: 

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Hillsborough Chert is associated with the Tampa Limestone Member of the Arcadia Formation, Hawthorne Group primarily occurring in the Tampa Bay area and the Hillsborough Quarry.