Spinel, Lec Yen, Yen Bai Province, Vietnam
These are not the prettiest specimens in the world but they ARE sizeable spinel crystals, both twins and single crystals. The type of twinned crystals shown here are the source of the term "spinel twin" that you see applied to many other Isometric crystal class minerals. All of these crystals originate from weathered marbles in Vietnam.
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