Rubies are the rarest colored gemstones found in nature, even rarer than diamonds. This rarity further gets reflected in ruby prices which remain subjective to origin, color, size and clarity of the gemstone. Plus, each ruby gemstone is unique in its composition, meaning any slight variation in color and clarity can make a huge difference in the overall pricing. Ruby prices begin from as low as. An Old Burmese ruby weighing between ½ and 1 carat with dark red or deep pink color and minimal inclusions can price anywhere between. Likewise, a one carat, fine quality Mozambique ruby can draw up to. In highly unregulated gemstone market, worth of rubies can be increased artificially by heat or color treatment. To ensure a fair purchase, it is advisable to buy rubies that are certified for their origin, color and clarity by recognized national or international laboratories.