Popular science about sapphire
Popular science about sapphire Sapphire is the general name for corundum gemstones of other colors except red rubies. The main component is aluminum oxide (Al2O3). Blue sapphire is caused by a small amount of titanium (Ti) and iron (Fe) impurities mixed in it; the color of sapphire can be pink, yellow, green, white, or even multiple colors in the same stone. Sapphires are produced in Changle, Shandong, China, Thailand, Sri Lanka, Madagascar, Laos, and Cambodia. The rarest of them should be the sapphires in Kashmir, and Myanmar is the place that produces the most high-quality sapphires today. The biggest feature of sapphire is its uneven color, with straight color bands and growth lines of different shades arranged on parallel hexagonal cylinders. Poly-flake twin crystals develop, and shutter-type twin crystal patterns are common. The cracks are mostly split along the twin crystal planes. Sapphires from different origins in the world have strong dichroism. In addition to the above common characteristics, sapphires from different origins also have their own characteristics. In the 1980s, many sapphire deposits were discovered in the basalt along the eastern coast of China. A blue star gem weighing 1,404.49 carats was discovered in Sri Lanka and is worth...