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
- Available
- Price
- $25.00
- Featured
- Featured in Special Editions
- Locality
- Wheal Maid Decline dumps, St. Day, Redruth, Cornwall, England
- Formula
- SnO2
- Size
- 5 x 5 x 3.5 cm - Miniature
- Tagged
- tin
Locality piece with a few good crystals to 1mm and crystal grains. Collected by Dale Foster in 2011.
- Availability
- Available
- Price
- $95.00
- Featured
- Featured in Special Editions
- Locality
- Redruth, Cornwall, England
- Formula
- Cu2FeSnS4
- Size
- 5 x 4.5 x 3 cm - Miniature
- Tagged
- sulfide, copper, tin
Massive silvery black mass from a desirable locality. It comes out of the A. E. Seaman surplus collection with an old label, see prov. tab.