Collectible Mineral Specimens Under $50
- Availability
- Available
- Price
- $20.00
- Locality
- Lancaster, Worcester Co., Massachusetts, United States
- Formula
- Al2OSiO4
- Size
- 1.2 x 1 x 0.6 cm - Thumbnail
A section of a Andalusite showing a chiastolite twining.
- Availability
- Available
- Price
- $40.00
- Locality
- Nightingale dist., Pershing Co., Nevada, United States
- Formula
- Ca3Fe3+2(SiO4)3
- Size
- 3.8 x 3 x 2 cm - Miniature
Fine Andradite crystals to 9mm. The color is darker than the photos.
- Availability
- Available
- Price
- $25.00
- Locality
- Northwest of Sasabe, Arizona, United States
- Formula
- PbSO4
- Size
- 8 x 5 x 3.5 cm - Sm Cabinet
Grey alterations rim around parent Galena with blue Chrysocolla.
- 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
- Locality
- Huelva, Andalusia, Spain
- Formula
- CaCO3
- Size
- 4.5 x 2.5 x 2 cm - Miniature
- Tagged
- carbonate
Cool oolitic Aragonite, variety ktypeite.
- Availability
- Available
- Price
- $30.00
- Locality
- Styrian Erzberg, Eisenerz, Styria, Austria
- Formula
- CaCO3
- Size
- 7 x 5.5 x 2 cm - Sm Cabinet
Snow white "flos-ferri" habit Aragonite.
