The name ruby comes from the Latin word ruber, which means red. It is favorite gem among those in power and those in love, inspiring more emotion than almost any other stone. Some ancient cultures believed that rubies, as well as other gemstones, grew on trees, just like fruit. The rubies would begin budding as small white gems, and would slowly grow and ripen, turning red in the light of the sun. When the ruby was saturated with red color, it was ready to be plucked.

Ruby is distinguished for its bright red color, being the most famed and fabled red gemstone. Beside for its bright color, it is a most desirable gem due to its hardness, durability, luster, and rarity. Transparent rubies of large sizes are even rarer than Diamonds. Ruby is the red variety of the mineral Corundum. Sapphire, the other gem variety of Corundum, encompasses all colors of Corundum aside from red. In essence, Ruby is a red Sapphire, since Ruby and Sapphire are identical in all properties except for color. However, because of the special allure and historical significance, Ruby has always been classified as an individual gemstone, and is never identified as a form of Sapphire (though some purplish-red colors may straddle the line of being classified as either Ruby or Sapphire).