Jade Microstructure Characteristics And Effects On The Quality,

The high quality Jadeite Jade deposit is occurred primarily in Myitkyina area the north of Burma. According to the geological characteristic of the jadeite deposit, The jadeite deposit is divided into the primary deposit and secondary deposit, Jadeite that occurred in secondary deposit have better quality.To make the systematically studied to Burma green jadeite of colorcausing mechanism, texture, microtectonics, texture and microtectonics to the influence of the quality, with polarization microscope, Fourier infrared spectra, cathode luminescence electron microprobe modern test in etc.green jadeite colorcausing mechanism are complicated. It has the primary colorcausing and secondary colorcausing. Through research: primary color come from primary mineral of jadeite, the jade-green color jadeite is main colorcausing element is Cr; secondary color come from secondary mineral, its green quality is lower.The texture and microtectonics of the jadeite proof jadeite is a kind of elevated temperature regional metamorphic rock. It is a key to decide the jadeite quality factor. The familiar fabric in jadeite has three type: crystalloblastic texture, metasomatic texture, cataclastic and deformation texture analysis thinks: The jadeite which have granule micro-granule crystalloblastic texture, nematoblastic texture, dentoid crystalloblastic texture, mylonitic texture, is opposite better quality. Mylonitic texture is a familiar texture in high-quality jadeite; metasomatic texture contain an negative and positive impact to the quality of the jadeite; cataclastic texture contain negative impact to the quality of the jadeite. The ductile deformation is important for quality of jadeite and the class of the color. It is prior condition of high-quality jadeite.Face to the difficult to ratings evaluation. Join together the jadeite market characteristic, I have proceed the ratings evaluation to the jadeite from color, quality, clean etc.