There are many colors of corundum. Wśród nich, the red corundum is the gem Ruby, which is the most expensive among colored gemstones, so it is regarded as the “Król klejnotów”; blue corundum is the sapphire we know as Sapphire, and other colors of corundum are also pink Color, purple, żółty, pomarańczowy, zielony, itp. […]
