USA (Part 2)


Sources:

 

Colorado

  • Blanca (San Luis Hills)
  • Del Norte (Twin Mountains)
  • Log House Creek
  • Specimen Mountain

 

Idaho

  • Bruneau
  • Crutcher's Crossing (rare)
  • Fir Grove (Gooding)
  • Marsing (Blue Opal)
  • Rabbit Springs
  • Spencer Opal Mine
  • Willow Creek

 

 

 

Minnesota

  • 5 Mile Hill

 

Michigan

  • Isle Royale
  • Keweenaw Point (subsurface)

 

Missouri

  • St. Francois Mountains

 

Montana

  • Avon (near)
  • Gallatin Valley

 



Colorado

Del Norte
Del Norte

size:

 

A large Del Norte thunderegg with some clear chalcedony filling.


Idaho

Bruneau Canyon
Bruneau Canyon

size:

 

The famous so called Bruneau jasper, a thunderegg jasper from a quarry in the Bruneau Canyon (Owyhee Co.).

Bruneau Canyon
Bruneau Canyon
Rabbit Springs
Rabbit Springs

size:

 

A thunderegg with botryoidal chalcedony from Rabbit Springs (Twin Falls Co.).

Rabbit Springs
Rabbit Springs
Willow Creek
Willow Creek

size:

 

A nice slab of the famous and expensive Willow Creek Jasper from the same named creek in the Ada Co. This jasper occurs in thundereggs.


Michigan

Keweenaw Point
Keweenaw Point

size:

 

Keweenaw Point is a pretty rare location. The eggs are collected sub-surface. Very old and very intersting.