Mineral Specimen and Product Inventory Search
- Availability
- Available
- Price
- $35.00
- Reduced Price
- $25.00
- 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 geologists. 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
- $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
- Reduced Price
- $18.00
- 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
- Reduced Price
- $18.00
- 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.
- Availability
- Sold
- Locality
- Wheal Gorland, St. Day dist., Cornwall, England
- Formula
- Cu2Al7(AsO4)4(OH)13·12H2O
- Size
- 7 x 4.5 x 2 cm - Sm Cabinet
- Tagged
- arsenate, copper
Light blue coatings.
