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2009-9-21 Source:AYpearl
Crystal is of a nature more than 3000 kinds of ore, its chemical composition is silicon dioxide, the density is 2, 65, is a Mohs hardness of 7, double-refractive index is a 1,544 - 1, 553, crystal transparency, hexagonal body shape.
Crystal hardness, crystal clear, since ancient times human beings much favor in the ranks of countries around the world was included in the gem.
1 Look at the election materials: choice of materials well crystal jewelry should not see the star point-like, cloudy, and floc distribution of gas-liquid inclusions. Texture with pure, smooth, crystal clear as well, if there are varying shades of off cracks, spots, you are defective.
2 See workmanship: crystal products processing process is divided into two kinds, namely, mill workers and carving. Such as crystal necklace, bracelet, earrings and other items belonging to grind; concept of audio-visual, etc., inside-painted snuff bottles are sculptures. A good working fine crystal products to be elegant, not only crystal products can be fully demonstrated the external America (shape, style, symmetry, etc.), but also to maximize the excavation of its inner beauty.
3 See polishing: polishing a direct impact on the crystal products worth. Crystal during processing to go through Diamond polishing sand, rough will produce signs of friction between the surfaces of crystal. A good crystal products of natural transparency, luster than good, according to jargon saying "flame foot."
4 See hole: For the augmented wear crystal products (such as necklaces, crystal bracelets, Buddha bead), depends on whether the hole is straight, the thickness of the hole is symmetrical, with or without small cracks. Pore walls must be clear and transparent, no "white marks."
5 to see color: even in the same type of crystal, it's different parts of the texture, color are all kinds of unique styles. Are monochrome, they should color uniformity; in depth on the same piece of crystal, then the demands of its elegant color lines.
6 See Coordination: to buy crystal jewelry, the exam wearing a look to see its size, elasticity, length. The case of inlaid ornaments, to see whether solid, and harmonized. Attention should also be crystal jewelry styles, colors it with his body, skin color, facial and clothing co-ordination.
Mastered the above aspects, I believe you will be able to pick very desirable crystal products.