How much does a 100 carat diamond cost?
Joseph Russell
Published Apr 30, 2026
“One hundred-carat D flawless are even more rare.” While Sotheby's doesn't have an official estimate, comparable diamonds have sold for between $11 million and $30 million in the past, Bruning said. The stone, described by Sotheby's as “the size of a lollipop,” will be sold at a live auction in Hong Kong on Oct.