Rare Minerals for Collectors

Locality

Oruro, Oruro dept., Bolivia 

Formula

Cu₂FeSnS₄ 

Availability

Available

Price

$150.00

Size

3 x 2 x 2.2 cm - Thumbnail 

Tagged

sulfide , copper , tin  

Dull, sooty black Stannite, probably partially oxidized and tarnished. Otherwise it should be brassy silvery color. The long shiny bladed crystals is the Jamesonite.

Locality

New Bullfrog mine, Nye Co., Nevada, United States 

Formula

Ag₃AuS₂ 

Availability

Available

Price

$325.00

Size

8.4 x 6 x 0.8 cm - Sm Cabinet 

Tagged

sulfide , silver , gold  

I can't exactly say that I can point to the areas where the Uytenbogaardtite occurs on this specimen. However, I can say it is in the area where the Gold particles are seen in the photos. The Uytenbogaardtite is probably the dark grey with tinges of purple. I've sold these slabs before and all were of excactly the same. The slab was undoubtedly cut for polished ore microscopy and EDS. Some of the areas, especially on the sides where it is not cut smooth, you will see a natural break lined with dark gray, sectile, Acanthite.