Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $25.00
- Locality
- Gunheath China Clay Pit, St. Austell, Cornwall, England
- Formula
- (Fe3+)24AlO6(PO4)17(OH)12·75H2O
- Size
- 4.5 x 3.5 x 2 cm - Miniature
- Tagged
- phosphate
Yellow crusts of Cacoxenite with green Arthurite. A good locality specimen.
- Availability
- Sold
- Locality
- Tolbachik Volcano, Kamchatka, Russia
- Formula
- NaCaMg3(AsO4)3
- Size
- 6 x 4 x 3.5 cm - Sm Cabinet
- Tagged
- arsenate
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
- Special Info
- Author's Material
Calciojohillerite is a greenish to yellowish to almost colorless well-shaped, terminated crystals (about 1 mm) combined in clusters / crusts on basalt scoria altered by fumarolic gas. The specimen is very rich. It is one of the few study specimens from Igor Pekov's collection used to characterize the new mineral. It is not yet published but was approved in 2016.
A more detailed locality is: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia.
- Availability
- Sold
- Locality
- Mt. Pyalkimpor, Lovozero Massif, Kola Peninsula, Russia
- Formula
- (Na,☐)2Ca(Ti,Mg,Nb)4[Si2O7]2O2(OH,O)2(H2O)4
- Size
- 3.5 x 1.8 x 2 cm - Miniature
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
Calciomurmanite is Na-Ca ordered analogue of murmanite. Murmanite does not contain calcium, only Na, by strict definition. Otherwise, you cannot tell these two minerals apart visually. Calciomurmanite crystals occur as thin plates and somewhat micaceous. The cleavage surfaces have a mother of pearl luster. This specimen was verified by Dr. Igor Pekov and was part of his study to define the mineral for publication. It is an approved IMA mineral, although not yet published.
- Availability
- Available
- Price
- $40.00
- Locality
- Mid-Continent mine, Cherokee Co., Oklahoma, United States
- Formula
- CaCO3
- Size
- 9 x 7 x 7 cm - Sm Cabinet
- Tagged
- carbonate
Large undamaged twinned scalenohedral Calcite crystal to 10cm down axis. Very nice piece sits perfectly well without aid.
- Availability
- Available
- Price
- $40.00
- Featured
- Featured in Special Editions
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- CaCO3
- Size
- 12.5 x 5.5 x 6 cm - Cabinet
- Tagged
- carbonate
White interesting formation of at least two generations of Calcite, perhaps as a cast of a former mineral.
- Availability
- Available
- Price
- $20.00
- Locality
- Yaogangxian mine, Chenzhou, Hunan prov., China
- Formula
- CaCO3
- Size
- 5 x 4.5 x 3 cm - Miniature
- Tagged
- carbonate
Nice miniature specimen withflat rhombic Calcite crystals at the base of several Quartz crystals to 4.5cm.
