Natural red sapphire, artificial red sapphire, synthetic red sapphire features: 1. Natural: 1 Ruby: The color is bright and bright but very uneven, and there are different shades of color. The inclusions are arranged in a certain direction. The fibrous rutile and fingerprint inclusions are the most common inclusions, and the cracks are staggered. The shape or the texture along the crystal plane develops flat. 2 sapphire: the color is uneven, visible in parallel with different shades of light and straight growth lines, in addition to the crepe, the inclusions also have a large number of gas-liquid inclusions, they are in the same plane, forming a unique Feathery, lotus-like, diffuse inclusions. 2. Man-made: 1 Ruby: uniform color, large block, clean interior, less inclusions, and some also have a large number of bubbles, the body is spherical or elongated, and connected in a string, or merged into a clot or Dust-like. 2 sapphire: crystal color is more uniform, less internal defects, less inclusions, common teardrop-like, beaded circular bubbles. 3. Synthesis: 1 Ruby: Fluorescence is stronger than natural ruby, bright red under ultraviolet light; after processing, dichroism can be seen on the surface of synthetic ruby ​​facet, while natural ruby ​​shows dichroism only in the waist direction. 2 Sapphire: Same as ruby. Optical Sapphire Substrate,Sapphire Substrate Window,Orientation Sapphire Substrate,4Inch Sapphire Substrate ShanXiZhongJuJingKe Semiconductor Co., Ltd , https://www.sxzjjk.com