Smithsonite Crystals on Chalcocite  - NTS 014

Measurements:  48 x 25 x 21 mm

Description:  Pink cobaltoan smithsonite crystals sit on chalcocite ore. 

The only notable damage is to some of the smithsonite crystals on the edges of the specimen. Otherwise only a few minute nicks, hardly visible withe the naked eye. 

Weight of Specimen:  45.0 g

Chemical Composition:  (Zn,Co)CO₃  (cobaltoan smithsonite) 
                                        Cu₂S  (chalcocite) 
                                         
Hardness on Mohs Scale:  (cobaltoan smithsonite)  4 - 4½
                                           (chalcocite) 2½ - 3

Location:  Tsumeb, Northern Namibia.

Specimen Code:  NTS 014