There are many kinds of natural olivines, not only the color is good, but also has a strong decorative effect, so many people like it. Because of this, there are many fake olivines on the market. Many people are fooled when they buy natural olivine. Being cheated, we must learn how to identify natural olivine. Next, the small series of China Jewelry Merchants Network will introduce the identification of natural olivine to see which gems are easily confused with natural olivine. Natural olivine is also called sun jewel. The common colors are green, yellow green, brown green, and the cleavage is not complete. The world's largest olivine is 27 carats, which is deep and perfect. It is a rare treasure. To identify olivine, it is necessary to understand gems that are similar in characteristics to olivine. Olivine is often green, and we can distinguish it by color. Appearance similar to olive stone has green tourmaline, diopside, wrong stone, glass, etc.; with polarizing or double shadow phenomenon can be distinguished from area glass and recalled aluminum garnet, synthetic spinel, plastic, fluorite; The refractive index and the birefringence ratio can be distinguished from diopside, emerald pyroxene, green tourmaline, gold emerald, and apatite. As we all know, many modern crafts gemstones like to use glass to imitate various gemstones. How to distinguish whether the peridot jewelry we purchased is made of real peridot or glass imitation? The internal structure of glass and peridot, olive There is a solution inside the stone, but no glass. The refractive index of the glass is different from the refractive index of the olivine. The refractive index of olivine is 1.65-1.69. We can also see if it has a "double shadow". There is no double shadow in the glass, and the olivine has a very obvious double shadow. In addition, the glass contains bubbles, while the olivine contains crystalline inclusions. It is a pyroxene that is nested with the olivine optical constant. It is effective to accurately determine the birefringence and density values. When the insert cannot measure the density, the comprehensive comparison of the inclusions, pleochroism, absorption spectrum and other differences is also beneficial. Rare gemstones that are nested or similar to olivine optical data, such as borologite and zoisite, require careful selection of test items. The boraxite is denser than olivine, has strong pleochroism and brown color, and has 493nm, 475nm, 463nm and 452nm absorption bands, olivine no 463nm narrow band; zoisite double fold rate is 0.009- 0.010. The absorption spectrum is only a diffuse weak band, at 595 nm, 528 nm, 455 nm, generally only the latter two. In addition, gold emeralds, beryls, etc. are also very similar to olivine, which is easy to confuse, but glass is the only olivine on the market. The green and green tourmalines of olivine are different in terms of density, hue, gloss, absorption spectrum, birefringence and refractive index. The olivine is olive green, has a large birefringence and a hardness of 6.5-7. The composition is magnesium iron silicate. The above is the knowledge of how to identify natural olivine, Xiao Bian hopes that you can pay more attention when you buy. Our yarns are suitable for all kinds of knitting yarns with soft feel and light fabric. All cotton fibers are imported and some fibers are recycled, in line with the international concept of environmental regeneration. We can also customize various fancy yarns, worsted, worsted and semi-worsted yarns according to guests' needs. Wool Fancy Yarn Cotton Fancy Yarn Main Recycle Poly Fancy Yarn Zhejiang Yijue Import And Export Co., Ltd. , https://www.yijuecashmere.com
