Ruby

Ruby is a pink to red gemstone consisting mainly of the mineral corundum (Al2O3) with an admixture of chromium that causes the color. The degree of hardness on the Mohs scale is 9. Africa, Asia (Burma), Australia, Greenland, Madagascar are among the largest deposits of rubies. The oldest deposits of rubies are the floodplains of the rivers of southwestern Sri Lanka (Kaliganga River) with the old center of Ratnapura. Rubies are sought-after magical and jewelry minerals. Their color is orange-red, raspberry, pale red, deep red, blood red - also known as "pigeon's blood" - these colored rubies are the rarest! The ruby is one of the most valuable gemstones, the value of which can sometimes be even higher than the price of diamonds of approximately the same size.