The most valuable diamonds tend not to be exchanged for money, but rather are given as gifts or taken as spoils of war. This makes them priceless.
The most expensive diamond, by definition, is priceless.
The Hope is not the most expensive diamond in the world, because its purchase price remains confidential. Other large, rare and famous diamonds have changed hands, but not necessarily for money.
dark green emeral is the most expensive thing on earth and olso i have some dark green emerald
Red diamonds are the most expensive in terms of money per carat, since red is the rarest colour of natural diamonds.
Red diamonds - are the rarest and most expensive.
pure diamond is the most expensive jewel
diamond
diamond
yes not only that but the most expensive gem of all at more than $200 million
Your question assumes that a diamond has changed hands for money. Often, the most glorious diamonds are gifts -- especially to royalty, and there is no record of any monetary value.According to Wikipedia, however:"Sotheby's just dropped the hammer on the most expensive diamond ever sold. The stone, a 59.6-carat flawless pink diamond called the "Pink Star," was auctioned for $83.2 million, according to Sotheby's. That made it the most expensive jewel or diamond ever sold at auction. Nov 13, 2013"
First of all Diamond Isn't even an element, Platinum is the most expensive element of all.
Probably a red diamond, since it is the most rare natural colour.