jasper
1. Ingredients: The content of tremolite in jasper is lower than that of sapphire. Jasper contains more cations, and also contains a certain amount of chrome spinel, graphite dots, chlorite and pyroxene.
2, color: sapphire color uniformity, jasper because of different minerals, color differences, the performance of jade color is not uniform. In addition to the yellow-green color of iron, it also contains chrome green. Sapphire is obviously more gray than jasper. Jasper is mostly greenish, dark green, dark green, greenish black, a contact zone produced by acid intrusive rock mass, pure and delicate, and another contact zone produced in ultrabasic rock mass, often containing point black minerals. Crystal, a bit of black mineral crystal is its unique feature, even if jasper is close to black, its flakes are still dark green under strong light. At present, it is rare to see the use of glass or plastic as a jasper. Commonly used jasper materials are black-green serpentine jade or dark sapphire.
3, oiliness and fineness: the composition of sapphire is relatively simple, the granules of jade are also relatively uniform, relatively delicate. The particle size of jasper differs a lot, usually the particles are thicker.
4. Market price: The output of jasper is less than that of sapphire, so the price of jasper is relatively high. In addition, the inhomogeneity of jasper determines that the value of jasper with less impurities will be higher.
Jasper-Jade jewelry selection, material quality, no matter what kind of jade to buy, we must put the material quality first, the material quality is to see the closeness (density) of jade. Jade is a collection. Jade with tight material quality is not easy to see its graininess. The fiber structure of jade is not obvious. It looks very uniform and clean.
Jasper jewelry
Second, the color, the quality of high-quality jasper has several requirements: uniform, clean, fresh. Among them, for the bright color, the jasper seed material is not used, because the color of the jasper seed material itself is a deep and heavy green tone, which is different from the green color of the mountain material. The mountain jasper requires bright colors. The brighter the color, the higher the grade of jasper color. However, the jasper with bright and uniform color is rare, even if the current price is high. Most of the jasper products nowadays are brightly colored and the color uniformity is not enough. That is to say, its color is deep and shallow, and there are very bright parts, but there are also dim parts, which look like flowers, so if you can If you buy a jasper with a bright color and a clean surface, then you can definitely get a fine jasper.
Third, black spots, jasper, regardless of the mountain material or seed material, most of the materials have a lot of black spots, that is the natural minerals in the jasper, the general carving master will try to avoid black spots when carving, but the finished jasper There are still many. So if there is no black spot on a jasper product or even one or two black spots are hard to come by.
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