Natural stone amethyst black spinel white topaz price parameters

It describes the common circular natural gemstones wholesale Specifications: 1.0mm, 1.25mm, 1.30mm, 1.35mm, 1.40mm, 1.45mm, 1.50mm, 1.60mm, 1.70mm, 1.75mm, 1.80mm, 1.85mm, 1.90mm, 2.0mm , 2.25mm, 2.50mm, 2.75mm, 3.0mm white topaz chemical formula Al2 [SiO4] (F, OH) 2, is generally colorless to yellow, shiny glass, transparent to translucent. Natural Topaz 1.619-1.627 refractive index, birefringence 0.008-0.010, 0.014 dispersion, hardness 8, density 3.49-3.57. Cambrian zircons name it "white topaz", namely white natural white topaz Topaz (Topaz), natural topaz hydrous aluminum silicate minerals. Amethyst is the English name for Amethyst, from the Greek, meaning "unbreakable chemical composition SiO2. Trigonal system, crystal-like hexagonal columns Purple Mountain Observatory, column mask stripes, with left and right shape shaped, double-crystal very common hardness 7. intracrystalline often with irregular or feathered wing-shaped gas-liquid two-phase inclusions. is a crystal family most expensive one, because in the crystal crystals containing Mn, Fe3 + and showed purple transparent, in two colors microscope obvious pleochroism Black spinel from it came out, the yield goes without saying how much the one hundred million, most of them do not use hand-finished and finished mosaic, usually with wax inlay Technical solutions must mosaic, black spinel plating equipment requirements are relatively high, black spinel coloring generally some of the processing temperature aging equipment or skilled workers will give poor plating caused this hope that the majority of jewelry processors to better grasp the plating process after the black spinel mosaic, so as to not cause plating coloring and other issues. never fade black spinel round, natural black color, and intricate machine-cut gem and more able to make gems shine, so that each gem debut each rings, pendants, chains, etc., so that each person wearing jewelry enchanting and beautiful, even more flamboyant Black Spinel is a natural The material does not fade and is experiencing a high temperature material, widely used on jewelry zircon (zircon crafts processing Cambrian black spinel), has a unique black, not color. ■ support mixed batch, [100] yuan from the grant or [100] grain from the grant (http://www.hanwujigems.com.cn) ■ more pages price, not as a trading price, the actual price should contact the manufacturer! ■ all can be mixed batch, if it is more number of words, the unit price in addition to talk, specifications optional specific price should be based on size, color and cut and determined. The company's products are free of all freight, tax all goods we are strict inspection, devoted to strict quality inspection, to ensure that no quality problems, side can be shipped as zircon CZ manufacturer, we always adjust our product prices to make our customers get the most competitive market price. gemstone CZ product quality remained stable and continues to increase. http://www.gaoshisell.com http://hanwujigems.cn.1688.com Cambrian zircon gemstone wholesale professional production of artificial zircon round color, purple egg-shaped egg-shaped sea blue zircon Zircon Cubic Zirconia, Ruby Sapphire (purple egg-shaped zircon), spinel, artificial zircon bracelets, Tel: 0774-2307890 0774-3884680 (circular colored zircon, zircon egg-shaped purple, navy egg-shaped zircon, Cubic Zirconia)