Rubies are the most precious of all the precious stones in the bible. Known as the "stone of love", it symbolizes passion like fire, the beauty, eternity and constancy of love. Ruby is the birthstone of July.
Diamond is a mineral made of carbon, the allotrope of carbon. Diamond is the hardest substance found in nature. It is a kind of elemental crystal composed of carbon element formed under high pressure and high temperature deep in the earth.