Ruby or Maniks are naturally occurring Gemstone which is a variety of the mineral ‘Corundum’ (Aluminium Oxide). In terms of Chemistry Ruby manic stones are mixture of Aluminium, Oxygen, Iron and Chromium. The chemical formula of this precious gemstone is Al2O3:Cr The name Ruby is derived from an ancient Latin word ‘Ruber’ means “Red”. After Diamond, Emerald and Sapphire it is the fourth important gemstones that enjoys huge importance in the field of astrology and Astro-science. This precious gemstone receives its Red color due to the presence of Chromium which is a well-known element in chemistry.