| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from China > Bournonite (cyclic twinned crystals) |
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| DESCRIPTION: | No. 81548 |
| Mineral: | Bournonite (cyclic twinned crystals) |
| Locality: | Yaogangxian Mine, 32 km southeast of Chenzhou, Hunan, China |
| Description: | Lustrous silver-metallic bournonite crystals, repeatedly twinned on the {110} plane, with highly reflective parallel crystal faces on all sides. The bournonite crystals have striated prism faces with basal pinacoid terminations with pyramidal edge faces. Bournonite, PbCuSbS3, is an uncommon lead-copper sulfosalt mineral. Weight: 8.7 grams. Reference: Mineralogical Record v.42#6, Rocks and Minerals v.80#1 |
| Overall Size: | 23x18x11 mm |
| Crystals: | 10-23 mm |
| Archived: | For reference only |
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