This is part of Chairish’s Fine Jewelry assortment.

Art Deco platinum, rose gold 2.1 inch long brooch
Old European diamonds weighing approximately 0.30 carats , G color VS clarity
Brooch made during early 20th century
Rose gold marked 585 purity, 14 karat
The Art Deco Platinum Gold Diamond and Black Onyx Brooch is a piece of jewelry that is designed in the Art Deco style, which was popular in the 1920s and 1930s. The brooch is made from platinum and gold, which are both precious metals that are often used in high-end jewelry.
The brooch features diamonds and black onyx, which are both classic materials used in Art Deco jewelry. The diamonds are of high quality and are cut in a geometric style, which is characteristic of Art Deco jewelry. The black onyx is likely to be carved or cut in a geometric style as well, which would complement the diamonds and enhance the overall design of the brooch.
The brooch is ornate and features intricate details and patterns. The design includes geometric shapes, such as squares, triangles, and circles, which are also characteristic of Art Deco jewelry. The brooch may be quite large and may be designed to be worn on a jacket or a coat.
The Art Deco Platinum Gold Diamond and Black Onyx Brooch is a stunning piece of jewelry that reflects the glamour and elegance of the Art Deco era. It is highly sought after by collectors and is sure to be a valuable addition to any jewelry collection.

Superb fine European 14k Diamond Sea Shell Pin ,
two toned gold 42 by 28 mm
bead set with 128 single cut diamonds 1.3 to 1.5 mm,
approximate total weight 1.60 carats ,
I colors ,VS-SI clarities,
gold weight 6.7 dwt /10.41 grams and
1.5″ h by 1″ w by 0.25″ d
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This exquisite antique circa 1900 18K yellow and white gold brooch pin is shaped like a bug or a fly. It features two rubies for eyes and two small prong-set diamonds sitting on each of its wings. The piece has a round pearl and measures 1.25″ in width and 0.25″ in height and 0.75 ” D It is in excellent condition.