Berga

Rock crystal is the colourless, transparent variety of quartz. Common as a mineral, it becomes uncommon at large sizes with clean material and precise faceting, where every internal feature is visible through the stone.

Berga weighs 909.35 ct and measures 66.08 x 44.06 x 40.30 mm, cut as an octagonal step/step. Colour is documented as near-colourless. Rock crystal of this type is commonly heated or irradiated, and colour authenticity is currently undeterminable.