Dolomite
| Colour | White, Pink, Gray |
|---|---|
| Mohs hardness | 3.5–4.0 |
| Lustre | Vitreous to pearly |
| Streak | White |
| Crystal system | Trigonal |
| Cleavage | 3 directions of cleavage not at right angles |
| Fracture | Conchoidal |
| Chemical formula | CaMg(CO 3 ) 2 |
| Specific gravity | 2.84–2.86 |
What is Dolomite?
Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally CaMg(CO3)2. The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite (see Dolomite (rock)). An alternative name sometimes used for the dolomitic rock type is dolostone.
How to identify Dolomite
- Lustre: Vitreous to pearly.
- Hardness: Mohs 3.5–4.0 — soft; a knife will scratch it.
- Streak: White.
- Habit: Trigonal crystal system.
Dolomite in different forms
Stones often confused with Dolomite
Frequently asked questions
How hard is Dolomite?
Dolomite is Mohs 3.5–4.0 on the hardness scale.
What colour is Dolomite?
Dolomite is typically white, pink, gray (White, grey to pink, reddish-white, brownish-white; colourless in transmitted light).