0.30 ct. RAPI up 4.2%, a bigger gain than in May.
Category: Auction
Top seller brings in $337,500 at October 2 sale.
More than 100 pieces will go up for sale for first time, including colored-diamond tie pin with $700,000 estimate..
Ruby and diamond ring leads auction, achieving $1.3 million.
Hong Kong Magnificent Jewels sale makes $11.1 million.
Sale will also feature more than 80 jewels from the collection of Shirley Bassey.
Jewel brought in $533,900, nearly nine times its upper price tag.
18th-century piece, which contains approximately 300 carats, is estimated to bring in up to $2.8 million in Geneva.
California and Knightsbridge auctions achieve nearly $3 million combined.
Cushion-cut, 8-carat diamond ring is top seller, realizing $336,000.
Piece contains 108 beads, with a ruby and diamond clasp.