Rare Mineral Specimens - search page
- Availability
- Sold
- Locality
- Keeley-Frontier mine, Cobalt dist., Ontario, Canada
- Formula
- Ag2S
- Size
- 3.3 x 2.8 x 1.0 cm - Miniature
- Tagged
- sulfide, silver
Soft, sectile mass of Acanthite with many crude forms of cubic crystals. The cluster at the tip is 7mm across. The specimen comes from the historic cobalt/silver Keeley-Frontier mine located in one of the largest silver mining districts in the world. The mine produced an incredible 3.3 million pounds of cobalt and 19.1 million ounce of silver. There is associated Calcite in mass and as crystals, a clear indication that the specimen was never etched.
- Availability
- Sold
- Locality
- Minerva #1 mine, Hardin Co., Illinois, United States
- Formula
- BaCa(CO3)2
- Size
- 2 x 1.5 x 1 cm - Thumbnail
- Tagged
- carbonate
White rice-shaped micro crystales to about 1mm. Alstonite is a rare barium carbonite found in only two localities in the USA, and a handful across the world.
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- K3Cu2+3AlO2(SO4)4
- Size
- 2 x 1.8 x 2 cm - Thumbnail
- Tagged
- copper
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
Tiny acicular green crystals throughout vuggy matrix. Rich. Dr. Igor Pekov specimen.
- Availability
- Sold
- Locality
- Arechuybo, Chihuahua, Mexico
- Formula
- Sb
- Size
- 5 x 2.5 x 4 cm - Miniature
- Tagged
- native element
Botryoidal silver native Antimony. Awesome specimen.
- Availability
- Sold
- Locality
- Himmelsfurst mine, Freiberg dist., Saxony, Germany
- Formula
- Ag8GeS6
- Size
- 2 x 2 x 1 cm - Thumbnail
- Tagged
- sulfide, silver
- Special Info
- Type Locality
This is an old Ward's Science specimen with an old hand-written label (see prov. tab). The specimen abounds in tiny 1mm and less Argyrodite crystals. Very rich, most of the specimen is Argyrodite.
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- Mg2(AsO4)F
- Size
- 1.5 x 1.5 x 1 cm - Thumbnail
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
- Special Info
- Author's Material
This is a specimen out of Dr. Igor Pekov's collection and was used to study this new species. This is the only known locality. The mineral forms translucent, glassy light green crystals with Hematite.
