黄玉的基本特征及其识别方法（The basic features and identification methods of topaz）.docVIP

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黄玉的基本特征及其识别方法（The basic features and identification methods of topaz）.doc

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黄玉的基本特征及其识别方法（The basic features and identification methods of topaz）

黄玉的基本特征及其识别方法（The basic features and identification methods of topaz） The basic characteristics and identification method of topaz Topaz because of its toughness is poor, the external force hit, it is prone to crack, it is not appropriate to make mens rings, but Topaz texture rather hard, hardness of 8 degrees. A higher proportion of topaz and diamond, almost the same proportion. Is much lower than the refractive index of diamond. Topaz usually some cracks, but as long as the defect cannot be found with the naked eye, this can be regarded as the top grade topaz. The topaz charm lies in its extraordinary beauty of color. Precious topaz, color is very bright yellow, tinged orange, whole golden color, called Golden Topaz Topaz or emperor. Sydney, brown tinged with Red Topaz, very shallow pale blue topaz, are precious stones, there are other pink to red and colorless Topaz topaz. Red Topaz topaz is usually by heating brown yellow and colorless Topaz price is very low. The value of topaz is a beautiful color, the color is rich, the greater the value. The origin of topaz is more, but the production of real quality Topaz countries except Brazil and Sri Lanka abroad are rare, so it is more precious topaz gems. When it is known as friendship stone, as the November birthstone. In the choice of topaz, first observe the flaws, defects were not found in the eye, only more than 10 times the magnifying glass to see it as the top grade. In addition to its color, should choose those with pleasing color appearance as velvet or velvet like topaz, and identify whether it has excellent polishing process. Topaz and Huang Shuijing looks very similar, easily confused. Huang Shuijing is a fairly common gem, the broad light as topaz, but because of its cheap, fine processing is also very beautiful, very easy ones, so often as a substitute for topaz. The basic characteristics and identification methods of olivine Was a very precious gem Peridot in ancient times. It is said that the ancient Eg