AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from England > Sphalerite (Spinel Law-twinned) over Quartz |
DESCRIPTION: | No. 69808 |
Mineral: | Sphalerite (Spinel Law-twinned) over Quartz |
Locality: | Smallcleugh Mine, Nenthead, Alston Moor, Cumbria, England |
Description: | Large cluster with many lustrous black sphalerite crystals to 12 mm over sparkling transparent colorless quartz microcrystals over gray matrix. The sphalerite crystals are repeatedly twinned following the Spinel Law of twinning on the {111} plane. Ex. Phillip Greybill (b. 1935- ) collection |
Overall Size: | 15x7x5.5 cm |
Crystals: | micro to 12 mm |
Archived: | For reference only |
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