Minerals and Metals in Ancient India v2.c47.127
Minerals and Metals in Ancient India v2.c47.127
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v2.c47.127
A. Phenocrystalline or Vitreous Varieties *Rock Crystal*. Colourless. Star quartz, *Amethyst quartz*, purple or bluish violet due to Mn. Yellow quartz (*false topaz*) or Citrine. *Cat’s eye quartz* like chrysoberyl. *Jasper* is impure opaque coloured quartz commonly red or yellow. *Aventurine (quartz)* is spangled with scales of mica, hematite or other mineral.