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
- $30.00
- Locality
- Hingston Down quarry, Gunnislake, Cornwall, England
- Formula
- CuFe3+2(AsO4)2(OH)2ยท4H2O
- Size
- 1.5 x 0.7 x 0.8 cm - Thumbnail
- Tagged
- arsenate, copper
- Special Info
- Type Locality
Small but excellent specimen from the type locality.
- Availability
- Available
- Price
- $495.00
- Locality
- Carn Brea, Redruth, Cornwall, England
- Formula
- Cu5FeS4
- Size
- 6 x 4.5 x 4 cm - Sm Cabinet
- Tagged
- sulfide, copper
Iridescent blue Bornite crystals from important Cornish mine.
- Availability
- Available
- Price
- $25.00
- Locality
- Newporth, Falmouth, Cornwall, England
- Formula
- CuPbSbS3
- Size
- 6 x 4.5 x 3 cm - Sm Cabinet
- Tagged
- sulfide, copper
Shiny silvery crystal grains to 6mm in matrix with green alterations.
- Availability
- Available
- Price
- $50.00
- Locality
- Cornwall, England
- Formula
- SnO2
- Size
- 5.5 x 5 x 3 cm - Sm Cabinet
- Tagged
- tin
- Special Info
- Antique Specimen
Solid mass of Cassiterite with some micro-crystals to 1mm. As seen, it is an old Foote specimen.
- Availability
- Available
- Price
- $25.00
- Featured
- Featured in Special Editions
- Locality
- North Seal Hole mine, St Agnes Consols, St Agnes, Cornwall, England
- Formula
- SnO2
- Size
- 5 x 2 x 2 cm - Miniature
- Tagged
- tin
Nice piece with light brown crystals to 2mm collected in 2015 by Dale Foster.
