| Chemical
Composition |
Manganese
carbonate with iron and calcium |
| Color |
Pink
to red |
| Refractive
Index |
R.I.
1.58-1.84. Uniaxial negative |
| Durability |
Hardness
3.5-4 |
| Crystal
Structure |
Hexagonal |
| Specific
Gravity |
3.4-3.6. |
| Sources
/ Occurrence |
Colorado,
South Africa, Argentina, Peru. |
|
|
|
