Color:  Port Ewen Chert ranges in color from a dark gray to black.

Texture: 

Luster:

Translucency: 

Silica Fabrics / Fossils:

Patina: Grayish white

Heat Treatment: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Port Ewen Chert is associated with the Port Ewen Formation or the Helderberg Group occurring as nodules from the Hudson Valley of New York and into New Jersey.  Exposures occur near Catskill and Accord.