Color:  Braintree Hornfels varies from a medium to dark gray.

Texture:  Fine gain

Luster: Dull

Translucency:  Opaque

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Braintree Hornfels are associated with the Braintree Argillite Formation of Massachusetts and Connecticut.  The primary source is the Massachusetts Braintree Slate/Hornfels quarry.  Braintree Hornfels is found throughout eastern Massachusetts and into Connecticut.