Calcite
UNB-2017-0072Minerals » Carbonates
Description
Two samples of euhedral rhombohedron colourless Calcite that has a vitreous lustre.
Calcite (CaCO3) can be white, colourless or pale shades of grey, red, green, blue or brown and black when impure. Lustre is vitreous or dull and streak is white. Hardness is 3 and cleavage is perfect in three directions forming a rhombohedron. Calcite is usually found a rhombohedron or scalenohedron but can also be tabular, cleavable, granular, compact, stalactite, oolitic or earthy.
Specifications
| Object name | Calcite |
|---|---|
| ID | UNB-2017-0072 |
| Legal status | Permanent collection |
| Category | Mineral |
| Classification | Mineral group: Carbonates |
| Composition |
|
| Origin | Unknown |
| Pieces | 2 |
| Partial | No |
| Measurements |
|
Publications
- Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.