| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from China > Bournonite (cog-wheel twinned crystals) with Boulangerite micros |
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| DESCRIPTION: | No. 81539 |
| Mineral: | Bournonite (cog-wheel twinned crystals) with Boulangerite micros |
| Locality: | Yaogangxian Mine, 32 km southeast of Chenzhou, Hunan, China |
| Description: | Doubly terminated brilliantly lustrous silver-metallic bournonite crystals with dark metallic boulangerite(?) microcrystals, repeatedly cog-wheel twinned on the {110} plane with, dominated by pyramidal terminations composed of reflective parallel faces. Bournonite, PbCuSbS3, is an uncommon lead-copper sulfosalt mineral. Weight: 73.9 grams. Reference: Mineralogical Record v.42#6, Rocks and Minerals v.80#1 |
| Overall Size: | 46x32x22 mm |
| Crystals: | micro-30 mm |
| Archived: | For reference only |
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