With rubies, emeralds and diamonds. Rubies are mined in Africa, Asia, Australia, Greenland, Madagascar and North Carolina. Are often found in Myanmar (Burma), Sri Lanka, Kenya, Madagascar, and Cambodia, but also in the American states of Montana, North Carolina and South Carolina. At the top of Mogok Valley in Myanmar has produced the best rubies but, in recent years, the very few good rubies have been found there. Unique color in Myanmar (Burma)
Sapphire described as "blood bath". It is known in the trade "Mogok" rubies. In central Myanmar the area of Mong also produces rubies. Depository in Myanmar is situated in the Non-Aligned Movement Q. In 2002 rubies were found in the river area and Asguez Kenya. Spinels are sometimes with rubies in the same rocks and error rubies. However, fine red spinels approaching the ruby average value. Sapphire has a hardness of 9.0 Mohs hardness of a wide range of metals. Sapphire crystal has been used to produce manufactured the first laser).