Corundum is a crystalline form of aluminium oxide with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the naturally clear transparent materials, but can have different colors when impurities are present.
Transparent specimens are used as gems, called ruby if red and padparadscha if pink-orange. All other colors are called sapphire. The name "corundum" is derived from the Sanskrit word kuruvinda meaning "ruby".
Because of corundum's hardness (pure corundum is defined to have 9.0 Mohs), it can scratch almost every other mineral. It is commonly used as an abrasive on everything from sandpaper to large machines used in machining metals, plastics, and wood. In addition to its hardness, corundum is unusual for its density of 4.02 g/cm3, which is very high for a transparent mineral composed of the low atomic mass elements aluminium and oxygen.
The chief sources of natural corundum are Myanmar (Burma), Sri Lanka, India, Thailand, South Africa, Tanzania, and the United States (North Carolina, Georgia, and Montana).
Sapphires and Rubies have played a big role in humans' mythological history, as well as in possessing metaphysical properties. For their rare beauty and strength, Sapphires have traditionally been the talisman among royalty. They signified true peace when worn during treaty signings during war times. Metaphysically, sapphires are known as wisdom stones, each color corresponding to a different aspect of one’s wisdom.
Black imparts confidence in one’s intuition, blue is a seeker for spiritual truth, green improves inner and outer vision, pink invokes what is needed for evolution to take place, royal blue eliminate negative energies, star sapphire draws one into the deepest parts of themselves, white opens the crown chakra, and yellow attracts wealth.
Here is a photo of a silver necklace. Marquise shape stone is created corundum:
Check out more jewelry with corundum.