Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $35.00
- Featured
- Featured in Special Editions
- Locality
- Redruth, Cornwall, England
- Formula
- KFe2+3(Si3Al)O10(OH)2
- Size
- 7 x 5.5 x 3 cm - Sm Cabinet
Bronzy black Annite flakes throughout mass.
Biotite has historically been treated as an individual mineral species by geologist. Rieder et. al in the Canadian Mineralogist v. 36 (1998), reclassified and placed Biotite within the Annite-Phlogopite series.
Biotite is a phyllosilicate of the Mica group and is classified as an ordinary (True or Common) mica meaning it has flexible cleavage plates. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.
- Availability
- Price
- $30.00
- Locality
- Cuenca, Castile-La Mancha, Spain
- Formula
- CaCO3
- Size
- 5 x 1.5 x 1.5 cm - Miniature
- Tagged
- carbonate
Purple near the center fading to greyish at the ends Aragonite with good cyclic twinning.
- Availability
- Available
- Price
- $395.00
- Reduced Price
- $250.00
- Locality
- Enna, Sicily, Italy
- Formula
- CaCO3
- Size
- 22 x 10 x 8.5 cm - Cabinet
- Tagged
- carbonate
Large beautiful specimn with "balls" covered by tiny Aragonite crystals with a core of Sulfur.
- Availability
- Sold
- Locality
- El Guanaco mine, Santa Catalina, Antofagasta, Chile
- Formula
- Cu2MgAsO4(OH)3
- Size
- 3.5 x 1.7 x 2.1 cm - Miniature
- Tagged
- arsenate, copper
Excellent velvety hemispherical groups of Arhbarite with blue bladed Guanacoite. The green crystals are Conichalcite. Arhbarite is a two-locality mineral and is considered very rare.3.5
- Availability
- Sold
- Locality
- Mina Ojuela, Mapimi, Durango, Mexico
- Size
- 2 x 2 x 1 cm - Thumbnail
"Bubbly" yellow green Arsenodescloizite.
- Availability
- Available
- Price
- $5.00
- Locality
- Chihuahua, Mexico
- Formula
- FeAsS
- Size
- Thumbnail
- Tagged
- sulfide
Silvery, shiny, sharp crystals.
