This was posted 2 hours ago. It has 0 notes and 0 comments. .
Copper and calcite
Calumet, Michigan
No. 0199 from the Elfstone Collection

Copper and calcite

Calumet, Michigan

No. 0199 from the Elfstone Collection

This was posted 1 day ago. It has 0 notes and 0 comments. .
Opal
Mexico
No. 0537a from the Elfstone Collection

Opal

Mexico

No. 0537a from the Elfstone Collection

This was posted 2 days ago. It has 2 notes and 0 comments. .
Dioptase
Tsumeb, Namibia
No. 0121 from the Elfstone Collection

Dioptase

Tsumeb, Namibia

No. 0121 from the Elfstone Collection

This was posted 3 days ago. It has 2 notes and 0 comments. .
Quartz with Elbaite
Himalaya Mine, Mesa Grande, San Diego County, California
No. xx-5 from the Elfstone Collection

Quartz with Elbaite

Himalaya Mine, Mesa Grande, San Diego County, California

No. xx-5 from the Elfstone Collection

This was posted 4 days ago. It has 0 notes and 0 comments. .
Linarite
Hensenberg District, Socorro County, New Mexico
From the collection of David T. Kalins

Linarite

Hensenberg District, Socorro County, New Mexico

From the collection of David T. Kalins

This was posted 5 days ago. It has 9 notes and 0 comments. .
Quartz with Elbaite
Himalaya Mine, Mesa Grande, San Diego County, California
No. xx-5 from the Elfstone Collection

Quartz with Elbaite

Himalaya Mine, Mesa Grande, San Diego County, California

No. xx-5 from the Elfstone Collection

This was posted 6 days ago. It has 4 notes and 0 comments. .
Smithsonite
Tsumeb, Namibia
No. 0127 from the Elfstone collection

Smithsonite

Tsumeb, Namibia

No. 0127 from the Elfstone collection

This was posted 1 week ago. It has 2 notes and 0 comments. .
Trilobite in shale
Utah

Trilobite in shale

Utah

This was posted 1 week ago. It has 10 notes and 0 comments. .
Microcline (var. Amazonite)
Old Gem Mine, Florissant, Colorado
No. 0133 from the Elfstone Collection

Microcline (var. Amazonite)

Old Gem Mine, Florissant, Colorado

No. 0133 from the Elfstone Collection

This was posted 1 week ago. It has 2 notes and 0 comments. .