Jade is a special kind of stone. It is fine and hard, shiny and slightly transparent. It can be carved into handicrafts, such as the seal of the ancient emperor - Yuxi. Jade is divided into jadeite and nephrite. Jadeite is a typical jadeite; the types of nephrite can be divided into: white fat white jade, white jade, white jade, sapphire, topaz, sugar jade, ink jade, jasper, such as Hetian jade is nephrite. The name of jade is also from nephrite. How did the jade come from? Jadeite, also known as jade jade, jade, jadeite, Burmese jade, the name of "Jade" comes from the name of the bird. The feather of this bird is very bright, the male feather is red, the name is ostrich, the female feather is green, the name is green. Birds, collectively known as jade. When the Ming Dynasty was introduced to China in the Ming Dynasty, it was named "Jade". The use of jade as jade is borrowed from the perspective of color, red is green and green is green. Emerald physical properties The Mohs hardness of jadeite is in the range of 6.5 to 7, the density is 3.34 (+0.06, -0.09) g/cm?, the refractive index is 1.666~1.680 (±0.008), and the spot is 1.65 to 1.67. The chemical composition of jade 1. Hard jade jade, most of the jade is of this type 2. Chlorophyll jade, mainly oil green jade, ink green 3. Sodium chromite pyroxene jade, the main varieties are dry green jade How to identify jade? 1. Look at the refractive index RI: The refractive index of jadeite is 1.66 (point test) 2. Test Density: The density of jadeite is between 3.33 and 3.36, suspended in 3.32 heavy liquid or slowly rising or falling. 3. Look at the absorption spectrum: The green jadeite variety has three step-like absorption spectra at 630 nm, 660 nm, and 690 nm in the red region, and there is an absorption line in the purple region. Jadeite has diagnostic significance at 437nm absorption line. 4. Magnification observation: Jadeite has a granular fiber interweaving structure, a columnar mosaic structure, a columnar crystal structure and the like. When the texture is fine, the surface after polishing is smooth and has a dimple peeling. When the texture is thicker, it can be seen that the cleavage surface flash is "green". Of course, it is very difficult to identify jadeites only by means of personal "eyesight". Therefore, the jewellery and jade identification certificate is particularly important. The authoritative certificate will indicate the refractive index, density, absorption spectrum, magnified observation, and the identification data of the certificate. We can easily know whether the current product is jade. With a certificate, we also need to check the verification certificate and the goods are consistent. Women's Blouses,Lady's Blouse,Women's Dress Shirt,Lady's Dress Shirt zhejiang tianjin import and export co.,ltd. , https://www.tianjintextile.com
