Next Catoca and Luele sales will see lower availability in those sizes, Endiama says.
Category: Auction
10.08-carat piece will headline November 12 Geneva High Jewelry auction.
Ring carries $1.2 million estimate at October 14 to 23 sale.
Price sets record for Italian auction house Aste Bolaffi.
A jadeite, ruby and diamond necklace with $7.5 million high estimate was withdrawn.
6.95-carat stone to lead November 10 Geneva Jewels Auction: V.
Sale brings in $9.2 million as fancy-dark-brown-greenish-yellow diamond ring soars to more than four times its high estimate.
Sapphire and diamond ring nearly triples estimate to become top seller at $819,982.
Piece sells for $406,200, missing its $514,100 estimate in Hong Kong sale.
Pieces sell for $310,100 against $231,400 upper price at Hong Kong auction.
42.68-carat sapphire will lead November sale in Geneva.