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Topaz crystals have appeared on the gemstone market, which are processed to get the maximum similarity to diamond crystals.

Everyone knows that the green color of an emerald is associated with an admixture of chromium in it. But this green color in stones from one or another deposit has different shades.

Chrysolite is a gem variety of olivine. It is a high-temperature mineral and its crystallization is primarily associated with ultrabasic and basaltic melts.

Kunzite is a rather rare jewelry variety of such silicate as spodumene.

For some minerals, the manifestation of such a property as polymorphism is characteristic.