Ruby 10mmRubies are one of the rarest gemstones. Rubies are made from the mineral corundum, which is made up of aluminum and oxygen atoms. The color of a ruby depends on the presence of other minerals or substances in the corundum. For example, chromium creates a deep red color, while chromium and ferric iron create orange and pink shades. Ruby is a gemstone of passion, protection, and prosperity, symbolizing the sun. Rubies offer protection by encouraging a