ALL meanings of bertrandite
ber·trand·ite
B b - noun bertrandite a mineral, hydrous beryllium silicate, Be 4 Si 2 O 7 (OH) 2 , colorless or pale yellow, with a vitreous luster, occurring as tabular or prismatic crystals in pegmatites and hydrothermal veins. 1
- noun bertrandite (mineralogy) A basic beryllium sorosilicate that is an ore of beryllium. 0