Theodore Roosevelt National Park; North Dakota Image #3815 4080 X 6144 pixels
Closeup of a slab of Wild Fire Opal (with some agate) from Utah; Pleistocene in age (approx. 19,000 yrs old) Image #4073 6143 X 3378 pixels
Macro photograph of a cut and polished piece of baryte and marcasite from Poland Image #3268 4723 X 3200 pixels
