BERTRANDITE
Be₄Si₂O₇(OH)₂
Counrad, Kazakhstan

Bertrandite usually occurs as a fine-grained replacement of beryl. Large distinct crystals are rare. This beautiful group of diverging bladed sprays is unusually fine for the species.

Size: 5.6 cm across

Acquired: 1993 Gem & Mineral Council purchase.

Disposition: Planned for display in the Systematic Mineralogy exhibit.

Catalog Number: 39098