Ostertag Necklaces

Interesting and distinctive estate Art Deco period platinum diamond and emerald pendant with a central design of a diamond eye framed by emeralds. The generous bale has an unusual feature of opening and closing which allows for wear on a wide ribbon or necklace. Wonderful workmanship with articulation at five points of the pendant. Prized for streamlined, elegant designs and excellent quality Art Deco jewels...

A lovely pendant with a fine gem-quality emerald in the center. The emerald weighs 0.75 carats and has a rich and bright vivid green color which is just so fine and pleasing to the e...

Finely detailed vintage Art Deco era onyx & diamond pendant/brooch (circa 1920s to 1930s), crafted in platinum & 10 karat yellow gold. Old European & rose cut diamonds total an e...

Elevate your style in a most extravagant manner with this Platinum Diamond brooch pendant. The platinum setting features an old Europ...

Super exotic looking Emerald and Diamond Brooch come Pendant. Add this to your collection and be ready to complimented everytime you wear th...

An antique diamond, platinum, and yellow gold convertible brooch and pendant, comprising eighty-eight old cut and rose cut diamonds, set in platinum, and backed in 18 karat yellow go...

Designed as a shield shaped surmount pierced as foliate garland and centering an aquamarine Emerald cut and weighing approximately 30.15 carats - transparent light blue in color Set ...

This 1960's vintage Boucheron piece of jewelry is a dual clip lapel brooch crafted in platinum and comprises masterfully designed, naturalistically inspired and diamond swathed scrol...

An impressive antique 1930s 0.87 carat diamond and platinum pendant; part of our diverse antique jewelry and estate jewelry collections. ...

Vivid Green Colombia Emerald! Must See In Person! --Stone(s):-- (1) Natural Genuine Colombian Emerald - Octagonal Brilliant Cut - Prong Set - Very Green Color - F1 - Colombian - 1.47...

An Edwardian emerald and diamond pendant/brooch, the pear-shaped emerald, weighing approximately 2.20 carats, accompanied by GCS ...

A very fine quality emerald takes center stage of this platinum made pendant. The emerald weighs 1.11 carats and has a rich vivid green color with excellent brightness and light retu...