A rare blue diamond has been unearthed at a mine in South Africa. The 25.5-carat stone was recovered by Petra Diamonds at its Cullinan mine and is expected to sell for more than $10,000,000.
"It's very unusual for a diamond of this quality and size to come to market," said company spokeswoman Cathy Malins.
In 1905, the renowned Star of Africa blue diamond - the world's second largest cut diamond - was discovered at the Cullinan mine. The pear-shaped 530-carat stone was presented to King Edward VII and became part of the British crown jewels.