Porcellanite
 Generic type










Natural Form:



Description of Physical Characteristics:

Color:  Porcellanite ranges from white to brown or various shades of gray.

Texture:  Fine grain

Luster: Porcellaneous to vitreous

Translucency:  Opaque

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Porcellanite is found throughout southeastern Montana, northeastern Wyoming, and into western North Dakota.  Specific formations have different types of porcellanite. 

 

Projectile point made from this material:



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References: (See Reference Page, Entry Number):

Indiana Hornstone
Similar Material:
Commonly made projectile point from this material:


Archaeological Context: