Brazilian Quartz Oval Cabochon with White-Copper Inclusions

About Quartz

Quartz is usually colourless and transparent, but natural impurities, radiation and microscopic inclusions produce white, grey, yellow, brown, pink, purple, green and smoky varieties. Clear quartz may show a glass-like lustre, while included material can display attractive veils, needles or landscapes. It crystallises as silicon dioxide, commonly in six-sided prismatic crystals with pointed ends, although massive and granular…