Natural Quartz · Rock Crystal
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.
Rarity Score: 6.5 / 10
Location: Stockholm · Private collection · JDBG GEMS
Colour authenticity
Near-colourless rock crystal is commonly heated or irradiated. For this specimen the colour authenticity is currently undeterminable.
Scale
At 909.35 ct and 66 mm across the table, Berga sits in the size class where clarity and cutting precision in quartz become difficult to maintain.