Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCuMg3(AsO4)3
- Size
- Miniature 3.5x2.2x1.7cm
- Tagged
- arsenate , copper
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
Stunning purple crystal groups of Johillerite. Very rich. This is the third reported locality worldwide. The type locality is Tsumeb.
Most specific locality info.: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia.
ID by Dr. Igor Pekov.
- Availability
- Sold
- Locality
- Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil
- Formula
- Na10Ca6Mg18Fe2+25(PO4)36
- Size
- Thumbnail 0.9x0.4x0.3cm
A small 9mm specimen of mostly black to dark brown Na-Ca-Mg-Fe phosphate with a resinous luster much like Griphite. Johnsomervilleite is terrestrially a very rare mineral found only in four pegmatites worldwide. The type locality in Scotland is a sillimanite-kyanite schist. The remaining four known localities are from meteorites. It probably is more common than the list implies.
- Availability
- Sold
- Locality
- Krunkelbach Valley U deposit, Menzenschwand, Black Forest, Baden-Württemberg, Germany
- Formula
- (UO2)(CO3)·2H2O
- Size
- Thumbnail 2.5x2x1.5cm
- Tagged
- carbonate
- Special Info
- Radioactive!!
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
Orange-red masses of Joliotite tested by XRD. It is associated with Arsenopyrite and Pytite. See provenance tab for analytical papers.
- Availability
- Sold
- Locality
- Dallas Gem mine, San Benito Co., California, United States
- Formula
- KBa2Ti2(Si5Al)O18·nH2O
- Size
- Miniature 4x2.5x2cm
- Special Info
- Type Locality
Group of lustrous, very dark red-black Neptunite crystals to over 2cm with etched terminations with very tiny clusters of colorless Jonesite to <1mm near the spherical crusty Crossite after something. Nice piece!
