2014年8月27日星期三

alluvial garnet gbrasives quality can be compared

According to the evaluation and purchase garnet color, transparency, granularity as the basis. Gem garnet CBN abrasive grit standard requirements: transparency, bright colors, particle size greater than 5 mm. In the international gemstone market, pristine, bright colors, high value garnet crystal clear. Emerald green chrome vanadium aluminum garnet highest value,alluvial garnet gbrasives quality can be compared with those emerald. Red, orange and red garnet is also very valuable. Purple teeth Ukraine is now one of the more common middle and low gems. Gaudy colors, pure, transparent varieties are purple teeth black share. Its refractive index is high, strong luster, color beautiful and diverse, is a favorite gem varieties. Many countries of the purple teeth black as "January birthstone", a symbol of fidelity, love and chastity. Westerners think purple teeth black with a life-saving magic; in the Middle East, White fused aluminum oxide  purple teeth black was elected to do the royal family keepsake. Geological Museum of China, the possession of an orange-red spessartite Shida Jing body, weighing 1397 karats, produced in Xinjiang. U.S. National Museum of Natural History in the collection of the world's best a cinnamon brown yellow transparent stone (iron, calcium and aluminum garnet), is a picture of Christ carved delicate, heavy 61.5 kt, priceless.

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