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Sphaerobertrandite

Type Locality
Sengischorr Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Mineral Data
Be3(SiO4)(OH)2
Strunz: 
9.AE.50
Physical Properties
Streak: 
White
Hardness: 
5.0
Tenacity: 
brittle