|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Oklahoma > Sphalerite var. Ruby Jack
|Sphalerite var. Ruby Jack
|Mid-Continent Mine, Picher, Ottawa County, Oklahoma
|Complex crystals of red-brown to black sphalerite crystals, many showing Spinel-law twinning, on limestone breccia matrix. The smaller crystals are translucent red, hence the name ruby-jack.
|For reference only
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