Louis Heissler Art Deco Signet Ring with Unheated Sapphire and Diamonds on Platinum dormeuses Edouardienne Toi et Moi engagement ring

Toi et Moi engagement ring in 18Kt rose gold and platinum (hallmark: hibou and Mascaron)

Sold in their original case

95 Ct (J color

comme le graphite

Signature et numérotation Cartier

Louis Heissler Art Deco Signet Ring with Unheated Sapphire and Diamonds on Platinum dormeuses Edouardienne Toi et Moi engagement ringPlatinum signet ring (hallmark: dog), set in the center with an oval sapphire weighing approximately 0. 90 carats, surrounded by old cut round diamonds with an estimated total weight of approximately 0. 35 carats (estimated color I, estimated clarity SI). Sapphire accompanied by its Carat Gem Lab certificate, specifying natural Siam sapphire without thermal modifications. French piece, circa 1925, Art Deco, by jeweler Louis Heissler (masters