The world's rarest gem is believed to be painite, a gem that most have never even heard of. Rarity does not equate to beauty in gems, however. The painite is an orangish or reddish brown, with the brown tint coming from iron in the crystal. It was first discovered in Burma in the 1950s and was widely considered to be the rarest of all gems, with only two faceted crystals in existence.
This exceptionally rare 2.26 carats red diamond ring set the world record in 2007 as the world's most expensive red diamond ever sold at auction. The ring sold for a whopping 2.6 million dollars to British jeweler Lawrence Graff.
Red diamond-Diamonds can occur in almost all colours of the spectrum, with yellow being the most common of all the fancy coloured diamonds. Although all natural fancy coloured diamonds are extremely rare, none are more so than the red diamond. Found mostly in Africa, Australia and Brazil, red diamonds are so rare that only around twenty to thirty true red diamonds are known to exist and most are less than half a carat in size.
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