There are many colors of corundum. Сред тях, the red corundum is the gem Ruby, which is the most expensive among colored gemstones, so it is regarded as the “King of Gems”; blue corundum is the sapphire we know as Sapphire, and other colors of corundum are also pink Color, лилаво, жълто, Оранжево, Зелено, и т.н.. […]
