Mineral Specimen and Product Inventory Search
- Availability
- Sold
- Locality
- Empire mine, Tombstone, Cochise Co., Arizona, United States
- Formula
- Cu2+3PbTe6+O6(OH)2
- Size
- 2.1 x 1.4 x 1.3 cm - Thumbnail
- Tagged
- copper, tellurium
Tiny emerald platy crystals of Khinite in tiny vugs with most of the matrix covered by green Dugganite. Verified by Raman.
- Availability
- Sold
- Locality
- Ison Creek, Elliott Co., Kentucky, United States
- Size
- 8 x 8 x 4 cm - Sm Cabinet
A large sawed portion of what is known as the Ison Creek Kimberlite, sometimes called the Elliot County Kimberlite. It is composed mostly of ultrabasic olivine-rich igneous rock called peridotite. The dark-green peridotite can be further broken down into components of serpentinized olivine and a number of accessory minerals, including phlogopite, pyrope, calcite, enstatite, magnesian ilmenite, and others. Xenoliths, mainly of shale, and igneous rock inclusions may occur in the Peridotites. Kimberlites are formed in the mantle about 100-135 miles below the surface. As the igneous mass forms, it begins to ascend through the mantle and crusts. At some point volatile gases begin to expand from the decrease in pressure and the molten mass can explode through the crusts reaching speeds of 1,200 feet per second. This information comes from a University of Kentucky pdf Click here to see it. Photos of the Kimberlite just like this one can be seen here.
What makes Kimberlites special is that they may contain Diamonds. This piece does not, that I can see.
- Availability
- Sold
- Locality
- Foote mine, Cleveland Co., North Carolina, United States
- Formula
- Ca4Fe2+Al4(PO4)6(OH)4ยท12H2O
- Size
- 3.0 x 2.5 x 1.5 cm - Thumbnail
- Tagged
- phosphate, pegmatite mineral
- Special Info
- Type Locality
Radial groups to 0.75mm of white or colorless Kingsmountite crystals.
Kingmountite crystals are much like Montgomeryite both of which form lath-like crystals with a sloping terminations. It is in fact isostructural with Montgomeryite and both are members of the Calcioferrite group. It is also the iron analogue of Montgomeryite and is usually white and sometimes light pink. The best specimens are probably from Hagendorf, although many fine specimens have been collected at Foote. It is primarily a mineral which forms in pegmatites, although has occured in bat caves and hydrothermal altered phosphate rich sedimentary deposits This can be considered a good specimen with both good coverage and crystal groups.
- Availability
- Available
- Price
- $30.00
- Locality
- Jenipapo dist., Itinga, Minas Gerais, Brazil
- Formula
- KZr2(PO4)3
- Size
- 3 x 3 x 3 cm - Thumbnail
- Tagged
- phosphate, pegmatite mineral
Colorless, or slightly bluish, modified cubic crystal to 1mm on cleavelandite matrix.
- Availability
- Sold
- Locality
- Moctezuma, Sonora, Mexico
- Formula
- PbMn4+Te6+O6
- Size
- 2.5 x 2 x 1.5 cm - Thumbnail
- Tagged
- tellurium
Tiny hemispherical brown crystals less than 0.5mm.
- Availability
- Sold
- Locality
- Sponda Alp, Chironico Valley, Leventina, Ticino, Switzerland
- Formula
- Al2OSiO4
- Size
- 18 x 11 x 3 cm - Cabinet
Large cabinet specimen of blue Kyanite blades to 8cm long in Pyrophyllite (?) matrix or "mica schist". This is a classic well-know locality which is often featured in many older mineral/geology picture books.
