Fine Mineral Specimens Over $50
- Availability
- Sold
- Locality
- Big Mike mine, Pershing Co., Nevada, United States
- Formula
- (Mg,Cu2+)SO4·7H2O
- Size
- 8 x 6 x 3 cm - Sm Cabinet
- Tagged
- copper
Alpersite was approved in 2003, but I haven't seen too many specimens of this mineral. It is a Mg-Cu sulfate and is post-mine. There are tiny crystals formless to tabular crystals less than 1mm and sugary aggregates. On this specimen there is also white, fibrous Pickeringite. This is the type and only locality. The lot that I have was verified by XRD.
- Availability
- Available
- Price
- $50.00
- Featured
- Featured in Special Editions
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- CaCO3
- Size
- 5 x 3.5 x 4 cm - Miniature
- Tagged
- carbonate
Light aquamarine to white Aragonite crystals to 6mm. Ex. E&A Shier Collection via Rocksmiths circa 1965.
- Availability
- Sold
- Locality
- Majuba Hill mine, Pershing Co., Nevada, United States
- Formula
- CuFe3+2(AsO4)2(OH)2·4H2O
- Size
- 7 x 4 x 3 cm - Sm Cabinet
- Tagged
- arsenate, copper
Bright green thin to almost fibrous acicular crystals. Excellent specimen.
- Availability
- Available
- Price
- $50.00
- Locality
- Khibiny Massif, Kola Peninsula, Russia
- Formula
- K2NaFe2+7Ti2(Si4O12)2O2(OH)4F
- Size
- 6 x 3.5 x 3 cm - Sm Cabinet
Coppery red long bladed crystals to over 1cm in syenite matrix.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- Cu3(CO3)2(OH)2
- Size
- 4.5 x 2.0 x 2.1 cm - Miniature
- Tagged
- carbonate, copper
Two sub-parallel deep lustrous blue Azurite crystals to 4.5cm. Ex. Prosper J. Williams.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- Cu3(CO3)2(OH)2
- Size
- 2.5 x 1.5 x 1 cm - Thumbnail
- Tagged
- carbonate, copper
An excellent thumbnail of deep blue Azurite with excellent crystals. The largest crystal is 9mm.
