It's the size of a small birds egg and it's no surprise this diamond is called a Fancy Vivid Pink Star, the light sparkles and dances around it.
The diamond is expected to fetch more than 21 million (USD) here at the Sotheby's auction house in Hong Kong.
The diamond is a rare 11.15-carat Fancy Vivid Pink Star diamond from the Williamson Mine in Mwadui, Tanzania, where it was discovered.
The mine which is one of the oldest in the world is famous for producing saturated pink diamonds, according to Sotheby's.
The auction house says pink is one of the rarest colors to occur naturally in diamonds and only the smallest proportion of the miniscule number classified as pink, are of strong enough color to classify as 'Fancy Vivid Pink'.
Also most are relatively small in size weighing less than 10 carats so this one is considered a rarity.
