|
Chemical formula
|
CuS; Cu 5 FeS 4 |
|
Crystalline system
|
Hexagonal; orthorhombic |
|
Class
|
sulphides |
| Origin | Durango, Mexico |
| Size | 2.0-3.0cm |
Massive Bornite and Covellina mixed with bluish, purple, reddish and gold colors.
Bornite is copper sulfide and has purple tones, hence its nickname "peacock". It is found in copper deposits, usually associated with chalcopyrite. Bornite and chalcopyrite are replaced by chalcocite and covellin.
Covellina, also called covelina or covelita, is a minor ore of copper metal. One of its uses is as a gem when cut in a brilliant blue cabochon.
The mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.