FILE - This picture taken on May 6, 2022 in Geneva shows"The Rock", a 228,31 carats pear-shaped white diamond mined and polished in South Africa over two decades ago, which is the largest white diamond ever to aChristie's says "The Rock," an egg-sized white diamond billed as the largest of its kind to go up for auction, sold Wednesday for more than 21.6 million Swiss francs , including fees — though at the low end of the expected range.
G-Color is not the highest grade, but fourth on the letter rung below the top-grade D-Color diamonds.
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