Ruby
ru·by | ˈrü-bē
noun
A member of the corundum family whose red color comes from chromium oxide in the stone
The Ruby is a precious gemstone in the corundum family of stones that is defined by its deep red color. There are other variations and colors of corundum, but rubies must be red by their definition, and are considered one of the four precious gemstones, alongside emeralds, sapphires, and diamonds. Rubies are highly sought after and are still used in place of diamonds for engagement rings and other important gifts given to or by individuals. Rubies are also extremely hard as a mineral, only behind diamond on the Mohs hardness scale. Rubies are the birthstone of July and have been given for centuries as a symbol of power, love, and charity.