- Blue Alkali Beryl
- Thumbnail, 2.7 x 2.3 x 1.5 cm
- Deo Darrah, Khash & Kuran Wa Munjan Districts, Badakhshan Province, Afghanistan
The main alkali-rich beryl crystal in this small cluster measures 1.8 cm across. The large tabular crystal is lustrous and translucent, with a rich blue sky color. Gorgeous, large thumbnail specimen. These were originally thought to be Rosterite or Vorobyevite, but further analysis by Dr. Federico Pezzotta confirmed they are alkali-rich beryls.