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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.

In order to get rid of such defects in diamonds, a refinement method was invented - drilling.

One of the visual diagnostic signs of the refinement of sapphires by the method of beryllium diffusion are such blue inclusions.