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- Availability
- Available
- Price
- $40.00
- Locality
- Mid-Continent mine, Cherokee Co., Oklahoma, United States
- Formula
- CaCO3
- Size
- 9 x 7 x 7 cm - Sm Cabinet
- Tagged
- carbonate
Large undamaged twinned scalenohedral Calcite crystal to 10cm down axis. Very nice piece sits perfectly well without aid.
- Availability
- Available
- Price
- $20.00
- Locality
- Homestake mine, Lawrence Co., South Dakota, United States
- Formula
- CaCO3
- Size
- 5 x 2.7 x 2 cm - Miniature
- Tagged
- carbonate
Calcite takes on different forms exhibiting water clear crystals and cleavage. The Homestake mine is a now the US National Lab studying Martians and other phenom weird particals.
- Availability
- Sold
- Locality
- Madan dist, Rhodope Mts, Smolyan Oblast, Bulgaria
- Formula
- CaCO3
- Size
- 10 x 8 x 4 cm - Cabinet
- Tagged
- carbonate
Creamy coated Calcite crystals to 2.2cm overgrown on colorless Calcite.

- Availability
- Sold
- Locality
- Holbrook Tunnel, Bisbee, Cochise Co., Arizona, United States
- Formula
- CaCO3
- Size
- Not Specified
- Availability
- Available
- Price
- $40.00
- Locality
- Linwood mine, Scott Co., Iowa, United States
- Formula
- CaCO3
- Size
- 5 x 4.5 x 2.5 cm - Miniature
- Tagged
- carbonate
These are just the coolest, flawless, Calcite specimens with interesting growth patterns and glass-like crystal faces. Marcasite mostly resides on the bottom of the specimen with a minimal amount inside the Calcite crystals.
- Availability
- Available
- Price
- $35.00
- Locality
- Linwood mine, Scott Co., Iowa, United States
- Formula
- CaCO3
- Size
- 5 x 4 x 2.7 cm - Miniature
This Calcite from the Linwood mine differs very much from one piece to another. Nice rhombic structure with a little Marcasite sprinkled in places and included in the Calcite crystals which measure to 1 cm.