Tag Archives: ruby

Corundum – Ruby

Description: Ruby is a variety of the mineral species corundum (ko-RUN-dum); hexagonal (trigonal) crystal system. Major Sources: Thailand, Burma, Kampuchea, Sri Lanka, Kenya. Appearance: • transparent to opaque• orangy red to purplish red, brownish red• phenomena: asterism, chatoyancy (very rare) Identification: Optic Character: DR, uniaxial negativeRefractive Index: 1.762-1.770 (+.009, -.005) Absorption Spectra: a strong doublet at […]

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