This Extremely Rare 10-Carat Blue Diamond Could Fetch $20 Million at Auction
The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...
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What is the birthstone for June? It actually has three. A guide to the colorful gems
The stone appears green or blue in daylight or fluorescent light. In incandescent light, it is red or purple. The gem takes its name from Emperor Alexander II of Russia, the Geological Institute ...