Ruby is one of the most popular gemstones, and is used extensively in Jewelry. Ruby is used in all forms of jewelry, including bracelets, necklaces, rings, and earrings. It is used both as centerpiece gemstone in pendants and rings, as well as a secondary stone to complement other gemstones such as Diamonds. Star Ruby is polished as cabochons, and, if clear, can be extremely valuable.

Large Ruby gems are extremely rare and valuable. Fine colored Ruby with a deep red color and excellent transparency can reach several thousand dollars a carat. Synthetic Rubies are inexpensive and often used as a cheap substitute for natural rubies.