| Chemical Composition |
A hydrated copper carbonate. |
| Colour |
Light to dark shades of green. Often banded or with swirled or bull's-eye patterns. |
| Refractive Index |
R.I. 1.65-1.91. |
| Durability |
Hardness 3.5-4.5. Moderately brittle. |
| Crystal Structure |
Monoclinic, often massive. |
| Specific Gravity |
4.05. |
| Sources / Occurrence |
Zaire is a primary source. |
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