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Publication
It is an artificial material used in jewelry as inserts in products.
Zircon is a mineral of silicate class, zirconium silicate ZrSiO4.
Cubic Zirconia is an artificially grown jewelry insert that has no natural analogues.
Diamonds have the property to glow in ultraviolet radiation.
Corundum is a common mineral, aluminum oxide Al2O3, found in deposits of different Genesis.
Not everyone knows that the color "London blue" is not natural for Topaz
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