Invisible set sapphire and diamond ring, French, circa 1940

Boucheron Ceylon sapphire and diamond cocktail ring. Set to centre with a cushion shape old cut natural unenhanced Ceylon sapphire in an open back claw setting with a weight of 4.86 ...

Art Deco star sapphire and diamond coronet cluster ring. Set to centre with an oval cabochon natural unenhanced star sapphire in an open back rubover and claw setting with an approxi...

Marchak cabochon emerald, carved ruby and diamond ring. Set centrally with a round cabochon natural emerald with no colour enhancement in an open back rubover setting with an approxi...

Sapphire, diamond and rock crystal ring, by Seaman Schepps circa 1940. A platinum and white gold ring vertically set with two hexagonal cabochon sapphires of differing sizes in collet settings with an approximate total weight of 4.00 carats, each encircled by a single row of forty eight round eight cut diamonds in bead settings with an approximate total weight of 0.70 carats, saddled over an inverted emerald-cut rock crystal, above an open gallery, flanked by tri-part shoulders, and on a square shank. UK finger size H 1/2. Seaman Schepps was born in New York City’s tenement-dominated Lower East Side in 1881, the son of Hungarian immigrants. Rising from these humble beginnings, he built a business that featured designs which drastically departed from the traditional modes of his day. These adventurous jewels came to define a new style that became popular with the elite of the 1930’s...

Platinum bombé style ring with 105 invisible-set square blue sapphires that total approximately 6.50 carats. Very clean and tailored ring. The ring is a size 6 1/4 and may not be si...

An intricately-made Invisibly Set Natural Sapphire Ring made in 18k white gold. The ring size is US 6. The total weight is 9.10 grams.

Oscar Heyman platinum ring contains 54 square sapphires in an invisible (or mystery) setting and 34 round diamonds (1.19cts). This piece is an impeccable specimen of invisibly set jewelry...

Ring in 18 karat yellow gold, eagle's head hallmark and platinum, dog's head hallmark. Domed, this sublime tank ring is composed of three rings. The one in the center has an oval cus...