Chrysoberyl cat's-eye synthetic single crystal

Colorless silicon carbide crystals

Colorless silicon carbide gemstones

Conversion of doped polycrystalline material to single crystal m

Diamond laser crystal and method manufacturing the same

Method for enhancing the color of minerals useful as gemstones

Mineral composition and method for manufacturing the same

Mixed crystals of doped rare earth gallium garnet

Process for the production of jewelling and ornamental material

Silicon carbide gemstones

Simulated diamond gemstones formed of aluminum nitride and alumi

Single-crystal material based on aluminium garnets

Single-crystalline jewelry material based on aluminium garnets

Solid state thermal conversion of polycrystalline alumina to sap

Synthetic diamond-containing material and method of obtaining it

Synthetic fire opal

Transparent polycrystalline garnets

Vanadium garnet materials

Vanadium garnet materials in the MnO-CaO-V.sub.2 0.sub.3 -SiO.su

Vanadium garnet materials in the MnO-CaO-V.sub.2 O.sub.3 -SiO.su