Fire and brilliance are two categories under which we would find gems stones and diamonds. Optical gemology is the identifications term used to describe the characteristics of the color, transparency and luster of these breathtaking stones. The lusters the quality of light that reflects from the surface of a stone, observing the transparency of a gem or diamond would depend on the amount of light that penetrates through the stones and this has an effect on the chemical and crystalline, that is how the reflecting of the colors are lightened up.
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