how to facet
gemstone main cabochon creation
min data

Mineral: quartz
Gem: lepidochrosite in amethyst
Size: 9x14 mm
Carat: 4.4 ct
Cut: rectangular step cut
Origin: Brazil
Genral Info: The name is derived from the German "quarz" of uncertain origin. It was called "krystallos" by the Greeks, but this later became the generic term for crystal.
Additional Information
A second stone is native cut to show off the inclusions and not for light return. The reddish needles in the stone are lepidochrosite (an iron oxide/hydroxide mineral). Since the stone is partially amethyst (getting its color form iron) it is not an infrequent combination in iron rich environments.
Closeup of the lepidochrosite needles.