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The Exceptional Platinum, Sapphire and Diamond Ring at Sotheby’s


There have been tons of adjectives used to describe jewelry but this might have been the first time I stumbled across “velvety” blue to describe a gem. With that said, the descriptor seems to be spot-on. Read more about this one of a kind gem and the ring its seated in.

The April Sotheby’s sale will offer one of the finest Kashmir sapphires ever to appear at auction. The Exceptional Platinum, Sapphire and Diamond Ring (est. $4/5 million) features a square emerald-cut Kashmir sapphire weighing 28.18 carats set in a tapered baguette diamond mounting designed by Oscar Heyman & Brothers.

The stone has no indications of heat treatment and is described by the American Gemological Laboratories (AGL) as “a gem of singular importance.”   According to the AGL, “It possesses the quintessential, velvety blue color that distinguishes a fine Kashmir sapphire….The pleasing color of this sapphire is further enhanced by a square emerald-cut fashioning which resulting in deep, internal color reflections and brilliance that complement the overall visual appearance of the stone, as well as a high clarity that results in a heightened degree of transparency.”