Blue Alkali Beryl
Thumbnail, 1.9 x 1.7 x 0.7 cm
Deo Darrah, Khash & Kuran Wa Munjan Districts, Badakhshan Province, Afghanistan
This is a single, doubly terminated crystal of lustrous and translucent, sky blue beryl. Complete all around, one of the few "floaters" in the pocket! These were originally thought to be Rosterite or Vorobyevite, but further analysis by Dr. Federico Pezzotta confirmed they are alkali-rich beryls.
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