Sapphire is found in Thailand, Sri Lanka, Madagascar, Laos, Cambodia, China's Shandong Changle, Hainan, Chongqing Jiangjin's stalagmite mountains, of which the rarest origin should belong to the sapphire in Kashmir, and Burma is the most advanced sapphire produced today. local.
The most prominent feature of sapphire is its uneven color. It can be seen that the parallel hexagonal cylinders are arranged with different shades of flat ribbons and growth patterns. Polycrystalline twin development, common blind double crystal pattern. Most cracks split along the twin plane. Strong in dichroism, the sapphire of different origins in the world in addition to the above-mentioned common features, but also because of the different origin.