Sapphire; the precious stone: Thing you must know!
Among the precious stones, one of the most beautiful and loved ones is sapphire. It is common in the goldsmith sector due to its various shades of midnight blue and light blue. It is also involved in making rings and necklaces. Now the Invisible Sapphire Necklace is popular among people because of its immense beauty. Most of the sapphires come from Australia, and Sri Lanka, with particular reference to the sapphires of the island of Ceylon. Sapphires: general information about this precious stone Sapphire is a variety of corundum, like a ruby. From the chemical point of view, it is aluminum oxide, with the chemical formula Al2O3, all chromatic. These are its physical properties: Hardness on the Mohs Scale: 9 Color: Different shades of blue Opacity: semi-transparent glossy As for the most famous blue-blue sapphire, the color comes from the presence within it of inclusions of hematite and rutile. When the inclusions are oriented, the phenomenon of asterism...