Eden Rose sails past $12 million high estimate at Magnificent Jewels auction.

12.21-carat pink more than triples upper price, fetching $1.9 million.

Graff jewel exceeds high estimate to fetch $801,496 at London sale.

Piece scores $3.6 million, triple its expected high price.

Cushion-shaped, 23.90-carat, fancy-yellow diamond takes top spot, fetching $289,621.

13.33-carat yellow with $120,000 high estimate will lead sale.

Stone expected to fetch up to $3.5 million at New York auction.

Toi et moi ring by Mouawad estimated to bring in up to $1.9 million at London auction.

Cyberattackers took a limited amount of personal client information, but not financial or transactional, according to company.

Piece was top-selling lot of Hong Kong Luxury Week, bringing in $8.7 million.