This is the transparent colorless hambergite crystal. Dimensions: 1.3 x 0.4 x 0.2″ (3.3 x 1 x 0.4cm). Weight – 9ct (1.8 grams). Origin: Russia, Transbaikalia.
Some information about hambergite:
Hambergite is a beryllium borate mineral named after Swedish explorer and mineralogist Axel Hamberg (1863–1933). The mineral occurs as white or colorless orthorhombic crystals.
Hambergite occurs in beryllium bearing granite pegmatites as a rare accessory phase. It occurs associated with beryl, danburite, apatite, spodumene, zircon, fluorite, feldspar and quartz.
It was first described by mineralogist and geographer W. C. Brøgger in 1890.