In Sanskirt, ruby translates to “Ratnaraj”, meaning “King of gems”. Fine quality rubies are the most valuable of the coloured precious gemstones. Some of the finest quality rubies come from the Moguk mine in Myanmar (Burma). Rubies are famous for their deep red colour tones and superior hardness. Rubies are the birthstone for July and the gemstone for the 15th and 40th wedding anniversaries. Fine quality rubies are found in Burma and Mozambique. It is common for natural rubies to be treated by heat to improve their colour.