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Under the A-class jade lamp, the texture is fine, the color is soft, the stone pattern is obvious; the slight impact, the sound is crisp and sweet; the handcuff has a heavy feeling, which is obviously different from other stone.
Killer one (B goods): B class goods look good color at first, carefully observe, color hair hangs evil, under the light observation, color transparency is weakened, slight impact, sound boring, lost the crisp sound of A goods, generally in two During the year, it gradually lost its luster, covered with cracks, reduced in density and reduced in weight.
Killer II (C goods): As for the first-class observation of Class C goods, the color is not right, evil, under the lamp, the color does not exist naturally in the interior of the jadeite crystal, but is filled in the crack of the mineral, presenting the net Distribution, no color roots, observed with a Charles filter, green red or colorless; scrubbed with strong fading, the surface color can be removed or turned brown.
Killer III (D goods): There are two main types of D goods that pretend to be jade jewelry. One is to emulate jade with other jade, mainly Thai jade and Malaysian jade, Nanyang Dushan jade, Qinghai jade, dense jade and Australian green jade. And Dongling Stone and so on. The difference between the above jade and the Burmese jade is that the hardness is low, the density is small (light weight), and the gloss is weak. The second is green glass and green plastic. Most of these alternatives are ugly and faint, and the gloss is very weak. The relative density is very light, the hardness is low (the nail can be inscribed), and there is no cold feeling.
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