The Hutton-Mdivani Jadeite Necklace was sold for $27.44 million by Sotheby's.
The Magnificent Jewels Auction was held in Hong Kong last week.
The price achieved was double the estimate, after bidders competed for nearly 20 minutes.
Sotheby's described the Cartier Jadeite bead, ruby and diamond necklace
"the greatest jadeite bead necklace of historical importance".
images via Sotheby's
The piece consists of 27 graduated jadeite beads of "highly translucent bright emerald green colours" with a clasp set with calibre-cut rubies and baguette diamonds.
The necklace was acquired by the Cartier Collection.
A truly magnificent piece!