A French Art Deco double clip brooch by Ostertag circa 1930’s. The brooch is designed as a double scroll and composed of 122 round-cut diamonds with an approximate total weight of 17.50 carats and 40 baguette-cut diamonds with an approximate total weight of 6.60 carats. The diamonds have a VS clarity and a G/H color grade. The brooch separates to be worned as a pair of clips. Signed “Ostertag France”. The actual clips are 18 karat white gold.(Mackleowe)


Diamond Brooches Art Deco Diamond Sapphire Platinum Ring. Centrally set with a step cut diamond approximately 1/4 carat and flanked on either side by a step cut trapezoid Diamond, further set with round diamonds and Swiss cut Sapphires. The gallery and shank are detailed with deep hand engraved workmanship. Circa 1930s, USA. Art deco diamond engagement ring. http://girlyinspiration.com/ N ART DECO EMERALD AND DIAMOND BROOCH. Set with two pear-shaped emeralds, within a baguette-cut diamond surround, accented by trillion-cut diamonds, extending a circular openwork scroll, composed of old European, circular and single-cut diamonds and square-cut emeralds, enhanced by baguette-cut diamonds, terminating with marquise-cut diamond detail, mounted in platinum, circa 1925. Cartier Art Deco Aquamarine & Diamond bangle 1935

0.75 ct Diamond and 0.34 ct Ruby, Platinum Dress Ring – Art Deco Style – Vintage Circa 1940Art Deco jewellery Comprising: a carved jade circlet brooch with cabochon onyx and old brilliant-cut diamond inner surround, to square cabochon onyx line and old brilliant-cut diamond bar spacers, 5.0 cm wide, jade broken and repaired, one onyx panel deficient; a lapel watch, the circular cream dial with Arabic numerals within a single-cut diamond geometric pierced surround, to a single and old brilliant-cut diamond pierced suspension and crescent-shaped brooch. A French Art Deco double clip brooch by Ostertag circa 1930’s. The brooch is designed as a double scroll and composed of 122 round-cut diamonds with an approximate total weight of 17.50 carats and 40 baguette-cut diamonds with an approximate total weight of 6.60 carats. The diamonds have a VS clarity and a G/H color grade. The brooch separates to be worned as a pair of clips. Signed “Ostertag France”. The actual clips are 18 karat white gold.(Mackleowe)

Refer: https://www.1stdibs.com/jewelry/brooches/brooches/ostertag-beautiful-french-art-deco-double-clip-brooch/id-j_21809/