Ostertag Brooches

Original Art Deco diamond and emerald brooch handcrafted in platinum. The brooch features Old European cut diamonds weighing approx...

Art Deco platinum antique emerald and diamond bar brooch. The center stone is a cushion cut emerald. There is an estimated 4.25 carat total weight of a white, eye clean, old European...

Platinum Art Deco Green Emerald And Diamond 25 Carat Brooch Art Deco Geometric Emerald And Diamond Double Clip Brooch. We are selling each brooch se...

A stunning, fine and impressive antique Art Deco style 0.48 carat emerald and 1.29 carat diamond, platinum brooch; part of our antique jewelry and estate jewelry collections. This stunning antique diamond and emerald brooch...

Art Deco Emerald Cab Brooch from the 1930's. High quality manufacture with channel set emerald paste baguettes and cabochons. Likely unsigned Trifari. 1.4"...

Art deco brooch depicting a Serpent battling a Griffin. Round and marquise shape diamonds weighing approximately 4.90 carats.

Art Deco Emerald and Diamond Brooch Clips Circa 1920's in Platinum Two Cushion Cut Emeralds Weighing .70 Carats Approximately Two Old European Cut Diamonds Weighing .65 Carats Appro...

Art Deco double clip brooch set with square, marquise, straight baguette and round diamonds weighing approximately 8 carats.

Art Deco onyx, diamond and emerald cabochon brooch. Set with one hundred and six round old cut diamonds with an approximate total weight of 10....

An emerald, diamond and onyx Art Deco brooch, ca. 1920, in platinum. The facetted square emerald weighs 2.14 carats and is of Columbian origin. It has an old mine vivid green colour...

Just the right size for day or evening, this unique oval brooch is hand made in platinum, with approximately 4 carats of old European cut diamonds. A lovely marriage of geometric art...

This square brooch is set in Platinum and has 49 round brilliant cut diamonds, 2 Trilliant cuts and 2 Baguette cuts for a total diamond weight of 4.25 carats. In the center is an em...