Halcyon is the jade with a kind of the most precious, highest value, be called " the coronal of jade " . Because mix east by a few countries,return area of people love, be called by international gem bound consequently " Oriental treasure " . But the development as the society, the halcyon that makes a holiday is increasing, the method is more and more brillant, let people's air defense be prevented deeply. So, how we should identify natural A goods halcyon?
1, burnish.
Judge burnish feeling. The burnish of natural halcyon is good, have pervious to light quality, when watching as a water, bright beautiful transparent, filling clever air. Halcyon immerses via strong soda acid after processing, the structure is loose, before filling up, the surface sees corrosion indentation, made generation diffuse reflection, burnish slacken. The colophony that add a person or plastic after waiting for organic filling, halcyon often has colophony burnish, candle shape burnish or vitreous burnish and colophony burnish, candle shape burnish mixes.
2, color.
Judgement facial expression is natural. Emerald A goods won't pass the craft processing such as coloring, color is pure natural. The color of natural halcyon distributings along the direction of grain, and the feeling to the person is deep embed the person won't give not specific sense in halcyon. Of colored part and the part that do not have color transfer natural, coloured root. If use Charles filter observation, natural Burmese jade is to won't turn into gules. Because emerald structure is destroyed, immanent and original optical character also produced a change, so " the color of halcyon of B goods enlarge distributings to feel without administrative levels. Although this is planted,the green of the halcyon that the method handles still is former add lustre to, but pass acidity solution immerse, base is whiten, green distributings relatively float, the directional sex of customary facial expression also was destroyed, look very factitious. The natural halcyon color that observes in the place of glazed line emerald color is major is relatively pure and bright and clean, won't adulterate normally too much motley, its color distributings even, glossiness is stronger; And the false halcyon that passes artificial processing does not have this kind of characteristic, put halcyon to the place of glazed line to observe so, if colour and lustre is pure and bright,can decide without the flaw it is true goods.
3, structure.
Halcyon is immersed by strong acid alkali after corroding, partial material is taken take, in the surface and in-house edge corrosion is formed between mineral crystal, generation connects general formula cranny in-housely. In transmission light illuminate falls, see the cranny that in-house freely interweaves. Below reflex condition, corrosion indentation of the surface or clarity of cobweb shape reticulation are visible. Appraisal handles effective method of halcyon this kind, cent is exterior observation and in-house observation. Observe internal composition of halcyon with transmission light. Fill up through blanching the emerald structure of processing is inattentive, grain brim bounds is ambiguous, grain is broken, cleavage is abrupt. Below lamplight, the structure of A goods is clear, the comparison of B goods is ambiguous. To colored halcyon, a goods structure is not close-grained, inattentive, structure of goods of B goods C is dispersive, give a person floating sense.
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