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OwnerAshot G. Petrosian, Armen S. Kuzanian +4inventors
InventorsAshot G. Petrosian, Armen S. Kuzanian, Karine L. Ovanesian, Tatyana I. Butaeva, Grigory O. Shirinian, Ashot A. Avetisian
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A single-crystalline jewelry material based on aluminium garnets of the general formula: Re.sub.3 Al.sub.5 O.sub.12, wherein Re=Y, Dy, Ho, Er, Tm, Lu and containing two dyeing additives. One of the additives is selected from the group consisting of europium in an amount of from 10.sup.-3 to 3% by weight or ytterbium in an amount of from 0.1 to 61.3% by weight and the other is selected from the group consisting of zirconium or silicon in an amount of from 10.sup.-4 to 1% by weight, or hafnium in an amount of from 10.sup.-3 to 3% by weight. The material has a color smoothly changing from green to violet.
A single crystalline aluminum garnet material consisting of Re.sub.3 Al.sub.5 O.sub.12, wherein Re is an element from the group consisting of yttrium, dysprosium, holmium, erbium, thulium and lutecium, and two dyeing additives, the first which is an element from the group consisting of europium in an amount of 10.sup.-3 to 3% by weight and ytterbium in an amount of 0.1 to 61.3% by weight and the second of which is an element from the group consisting of zirconium in an amount from 10.sup.-4 to 1% by weight, silicon in an amount of from 10.sup.-4 to 1% by weight and hafnium in amount of from 10.sup.-3 to 3% by weight.
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