中高级宝石(国外英语资料).docVIP

中低档宝石(国外英语资料) Crystal: three square system, columnar crystal, cylindrical development of transverse stripes. Colorless, purple, pink, brown, gray to black. Glass luster, transparent, a small number of inclusions due to low transparency. No cleavage. Shell fracture. Hardness 7. A crystal of light, like bovine interferogram. Refractive index: 1.544-1.553. birefringence: 0.009. colorless crystal, no multi-color, colored crystals, multi-color, strong and weak, affected by the color depth. Piezoelectric effect and thermoelectric effect. Inclusions are rich, gas-liquid two-phase, negative crystalline, solid inclusions of various forms. Color: Amethyst, crystal, quartz, crystal color. Quartz cat eye, starlight quartz. Water bile crystal (in the growth process of instant gas entering into the liquid or graphite particles of them). Iridescent quartz (produces colour flash). The crystal (colorless transparent crystal crystal, contain a variety of mineral inclusions, fibrous, vegetation, acicular, radial rutile, tourmaline, natural gold inclusions). Adapted stones: single crystal quartz in the jewelry industry collectively referred to as crystal. Amethyst, iron. Smoky quartz, aluminum. Hibiscus stone, manganese, titanium. Huang Shuijing, trace iron and structural water. Garnet: equiaxed, crystalline structure, island silicate, diamond twelve face, four angle, 38 faces, poly type, crystal surface visible growth lines. Common colors: red, yellow and green. Ingredients: magnesium garnet, calcium magnesium garnet, manganese, aluminum, iron, aluminum, calcium, iron, calcium, chromium, water, calcium and aluminum. Jade and water aluminum calcium garnet distinction: refractive index is different, brittleness is different. Quality evaluation: color, transparency, clarity, quality, cut. Spinel: red, blue zinc and chromium. Eight face, hardness 8, glass - sub - adamantine luster. Specific gravity, 3.60, refractive index, 1.728. color: red, yellow, blue, green, purple and so on. Or six