A black, bladed cluster of the rare sulfide mineral betekhtinite perched between calcite crystals
AN_306
1 Item
Data sheet
- Locality
- Dzhezkazgan, Kazakhstan
- Size category
- Miniature
- Size (cm)
- 5 x 3.5 x 3
- Weight
- 36 g
- Formula
- (Cu,Fe)21Pb2S15
- Properties
- Thin blades or needles; black, sooty; poorly iridescent