Rubies and sapphires are among the natural colored gemstones and are the two most popular gemstones that are loved and sought after. Both rubies and sapphires belong to the class of corundum, and the chemical composition is aluminum oxide, which is slightly inferior to diamonds. Pure corundum is colorless and transparent, blood red ruby, because corundum contains chromium; sapphire's coloring element is titanium, if the gem contains traces of titanium and iron, the gem becomes dark blue. Red sapphire good cuts pay attention to four points: 1. Proportion and symmetry: Regardless of the type of cutting used by the gemstone, it must meet the requirements of the standard specification, and the symmetry should be good and should not be skewed. Length, width, and thickness ratios and angles are important and must be met because they are designed based on the refractive index of the gemstone and the principle of total reflection of light. If it is thin, it will leak light, the color is light, and the dispersion effect is also poor. In the jargon, there is no "fire head", which is called "fisheye effect". It looks dull and brilliance. If it is cut too thick, it will change color. Dark, also affects the "fire head." 2. Cut positioning: Since red sapphire is anisotropic, it has pleochroism. When cutting, the table should be strictly perpendicular to the long axis, avoiding the influence of pleochroism, so that the finished product can see the purest and saturated color from the table, which is the correct orientation. Otherwise, it will cause color misregistration and be motley due to pleochroism. 3. Starlight effect: For red and sapphire containing three sets of aligned fibrous inclusions, the arc-shaped plain cut can produce a starlight effect. The cutting of such gemstones must not only consider the symmetry and proportion, but also select the direction and position so that the starlight of the finished product is in the middle. If the cutting is not good, the value will be reduced if it is skewed. 4, the degree of polishing: the quality of polishing will affect the luster of the gem. High-quality polishing gives the gem a stronger glow and shines. The above is the "four major points of ruby ​​and sapphire cutting must be cautious" information for your reference, more knowledge about ruby ​​and sapphire, please pay attention to China Jewelry Merchants Network . Enamel medals represent our most economic enamel Medal. Custom Enamel Medal are manufactured from zinc alloy or bronze with a soft or hard enamel fill and include an epoxy resin coating, which protects the medal from scratches and gives a smooth finish. Your custom design can include many colours and can be stamped to any shape with the options of a gold, silver, bronze or black nickel finish. Personalised Custom Made Medals in Soft or Hard Enamel, 2D or 3D Designs with a Shiny! Soft Enamel Medal,Enamel Medals,Custom Enamel Medal,Custom Soft Enamel Medal Shenzhen MingFengXing Art & Craft Products CO., LTD. , https://www.blankmedal.com
