Shu Shi Yan Shi / Su Ji Shi, also known as the "Millennium Stone", is also the birthstone of the February calendar. Shu Qushi/Su Ji Shi is a rare gemstone and is known as the "Gem of South Africa". Produced in small rock beads of neolithic syenite, the main component is silica, and contains various metal elements such as potassium, sodium, iron and lithium. Founded in 1944 by a Japanese oil explorer, Mr.Kenichi Sugi, it was named after his name, but it was not until 1979 that some of the Wessel manganese mines collapsed, and South Africa discovered the gem-quality sapphire. / Su Jishi. As a new gemstone material in the jewelry market, its gem mineralogy is still a blank in the research field. It can be seen from the routine test of gemstone that the sample of Su Shishi is a collection of jade, mostly blue, purple and brown, and the structure is fine. Electron probe and X-ray powder diffraction analysis showed that the main mineral component of Su Shishi sample was Su Shishi, and contained impurity minerals such as acupuncture, neolithic and quartz. The appearance is a variety of opaque shades of purple and purple, or even deep to black, Royal Purple is the highest quality color, long-wearing can make the color of the brilliance more beautiful. The beautiful purple with different levels, combined with different shades, makes the sapphire/Su Jishi a mysterious and cool color. It is a very special gem. Physical and chemical properties of Shukulaishi 1. English name: sugilite 2. Mineral name: ferrosilicon nano-lithite 3. Chemical composition: (K, Na) (Na, Fe) 2 (Li, Fe) Si12O30 4. Crystal system and crystal habit: hexagonal crystal system, rare crystal, often semi-self-shaped granular aggregate 5. Color: red purple, blue purple, rare pink 6. Gloss and transparency: waxy luster to glass luster; translucent - opaque 7. Optical rotation: one-axis crystal, negative optical rotation. 8. Refractive index and birefringence: The refractive index is 1.607-1.610 (+0.001, -0.002), and the spot refractive index is usually 1.61, but sometimes the low quality of 1.54 is detected due to the internal quartz impurities; birefringence The rate is 0.0039. Fluorescence: no to medium, short wave under blue 10. Absorption spectrum: There is a strong absorption band at 550 nm, and there are absorption lines at 411 nm, 419 nm, 437 nm, and 445 nm. This absorption spectrum is the result of the interaction of manganese and iron. 11. Cleavage and fracture: no cleavage; uneven fracture 12. Mohs hardness: 5.5-6.5 13. Density: 2.74 (+0.05) g/cm3 14. Magnification check: Deep purple body color is the main identification feature Su Jishi is produced in the manganese-containing region of the Kalahari Desert in South Africa, and there are sporadic small mines in Japan and Canada (Quebec). Although Su Jiushi’s history of discovery is short, it has been reported that this gemstone resource is almost exhausted. No other scaled Suji stone mine has been found. Embroidery,Woven Cotton Fabric,Embroidery For Lady Dress,Woven Cotton Fabric SHAOXING YINGSIPE TEXTILE CO.,LTD , https://www.chinayingsipei.com
