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How to identify goods Jade A, B goods, C stock? - Jade, Jade - Jewelry Industry - Removable Switch S
Goods on the A, B goods, C goods how to identify problems, and many books and articles have discussed, but recommended a number of methods of identification are the lack of maneuverability, such as IR Spectroscopy, laser Raman spectroscopy method.
These instruments and equipment, as an ordinary collectors do not say can not afford, that is affordable is also very difficult to buy. Some "experts" feel on the identification, it is difficult to grasp for beginners. Such as the B goods are of open green there is a feeling, a floating feeling; B goods Jade Chui was attenuated after injection plastic, significantly lines diffuse.
Feeling after years as a professional in A, B goods arrive at a differential experience, the average collector to master in a short period of time is a very easy task. I also desperately seeking to find this feeling, but still at a loss, with little success.
Then, for a first joined the Road, the hands of only a few simple tools (40-fold Magnifier , Light Flashlight , Balance Or two methyl iodide, Refractometer Or a bromine Chennai) collectors, how to identify goods A, B goods, C cargo?
I think first of all start from the density. Each piece of jade that is obtained after the first thing to do is to measure its density, where lower than 3.33 of it should attract attention. The reason is simple, although the density of jade is defined in 3.25? 3.43 between the lower density of jade is A cargo of its texture will not be very good, but the density of 3.33 above the possibility of Jade Cargo B has occurred lower. Because not all are suitable for B jade goods.
General, goods made of jade B is coarse loose texture, transparency and poor, with yellowish brown and black spots of jade-like material; In addition, from the color point of view, suitable for B must be green jade goods . But not all with green jade is worth doing, only the green better, but transparency is not high, but there are many impurities in which the jade was worth doing.
More importantly, B is now processing the material goods are the 83 most jade, jade and 83 the relative density is lower than 3.33, at 3.25? Between 3.31. This gives us the correct identification of goods A, B provides a reference goods. Second, we must carefully observe the surface characteristics of jade. Environment with 40 times magnification to side light (oblique illumination method) were observed, A cargo of smooth surface like a mirror, has a strong Glass Gloss. That some small trachoma, Hang point is in the penalty phase of mineral grains or multilateral triangle strip appears. The B point of pit trachoma goods over to the form of corrosion holes, characterized by a round, deep, black, blunt the edge of loss.
In addition, B goods curved surface covered with different lines, crisscross mesh, dendritic grooves, as the general aging of the asphalt. A cargo surface, although it can see fine lines, but that is the transfer between particles fine lines. Some low-quality goods A, because Polishing Bad, there will be a number of grooves, but these grooves is difficult to polish in the local, but not the edge of dissolution of the marks.
Jade bracelet A, B Identification of general cargo to listen to voice-based. Without cracking the case will be a bracelet with a finger lift, picked up another bracelet or other hard objects gently tap (be sure to gently tap, forced one of the bracelets have big damage, and second, the sound may be wrong), A cargo sound crisp, long a reply, showing metallic sound; B goods sounds boring, hoarse. Jade C
on simple identification of goods, usually for transmission of its light flashlight, A is colored green goods, the end of the first color, with shades of transition spots into banded, and C goods under the light transmission , are distributed in the grain around the green or cracks were among the thin line. [Keyword Search]: Jade Jade Large In Small
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