The no heat ruby stones remain untreated by artificial processes like heating or flux treatments. It is estimated that untreated ruby is very rare, with only one percent available in the market. The shades range from pink to purple in their natural state, with the no-heat pigeon blood-red burmese ruby being the rarest. The unheated ruby price per carat is generally higher because of their rarity and purity and ranges from INR 10,000-5,00,000 per carat and can also go above. The no heat ruby is mostly revered for its natural features and astrological benefits bringing protection and prosperity to the wearer.