| GREEN CALCITE |
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| Name | Calcite |
| Formula | CaCO3 |
| Hardness (Mohs) | 3 |
| Density | 2.71-2.94 |
| Crystal System | Hexagonal |
| Colour | Colourless, white, yellow, red, blue, green, black |
| Lustre | Vitreous, pearly on cleavage surfaces |
| Associated minerals | Aragonite |
| Comment | Clear varietes of calcite are used in optical instruments, including polarising microscopes |
| Overall size of mineral specimen | 50 x 22 x 25 millimetres. |
| Location | Mexico |
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