MONOCRYSTAL JEWELRY MATERIAL ON THE BASE OF GADOLINIUM-GALLIUM GARNET Russian patent published in 1994 - IPC

FIELD: production of artificial monocrystals. SUBSTANCE: monocrystal jewelry material on the base of gadolinium-gallium garnet having formula Gd₃Ga₅O₁₂ contains cobalt and hafnium as color additives at quantity 0.001-0.5 mass % and 0.001-1.0 mass % respectively. Total quantity of said additives is not more 1.1 mass %. Proposed crystals have diameter 35 mm, their weight being approximately 350 g. EFFECT: produces crystals having predetermined brightness and uniform cooler throughout its whole volume. 1 tbl