| Blue Hills
Rhyolite Milton, MA
|
 50x plane
polarized
|
 50x cross
polarized
|
 50x plane
polarized
|
 50x cross
polarized
|
| Lynn
Rhyolite Marblehead, MA
|
 50x plane polarized
|
 50x cross polarized
|
 50x cross
polarized
|
 100x cross polarized
|
| Mt. Kineo Rhyolite Traveler
Formation, ME
|
 50x xpol
|
 50x xpol
|
 100x xpol
|
 100x ppol
|
| Attleboro
Red Felsite Attleboro, MA
|
 50x plane
polarized
|
 50x cross
polarized
|
 100x cross
polarized
|
|
| Parrat
"Jasper" Berkshire Co., MA
|
 50x plane polarized
|
 50x cross polarized
|
 100x cross polarized
|
|
| Conklin
Quarry "Jasper" RI
|
 50x plane polarized
|
 50x cross polarized
|
|
|
| Normanskill
Chert Coxsackie, NY
|
 50x cross
polarized
|
 100x cross
polarized
|
|
|
| Jefferson
Rhyolite Jefferson, NH
|
 50x plane
polarized
Sphere
|
 50x cross
polarized
Sphere
|
 50x cross
polarized
|
|
| Onondaga
Chert New Scotland, NY
|
 50x plane
polarized
Chalcedony
|
 50x plane polarized
|
 50x cross polarized
|
|