This is the back of a clip brooch. It is adaptable so could either be worn as a single item or in two separate pieces as dress clips.
AN ART DECO DIAMOND CLIP BROOCH, CIRCA 1930 Of openwork geometric design, set throughout with brilliant, baguette and single-cut diamonds, diamonds approx. 5.15cts total, length 4.0cm
Sold for £1,912 inc. premium at Bonham’s in 2020
CORAL AND DIAMOND STRAWBERRY CLIP-BROOCH, TIFFANY & CO. Designed as a strawberry, freeform coral plaque, single-cut diamonds, 18k gold and platinum, 1 ¾ ins., signed Tiffany & Co., ‘Italy’, black Tiffany & Co. case
Sold for USD 7,500 at Christie’s in 2019
Platinum, Diamond and Ruby Clip/Brooch 86 round & 4 baguette diamonds ap. 1.75 cts., one sugarloaf cabochon ruby, 5 round cabochon rubies, rectangular-cut rubies, c. 1930, ap. 9.8 dwts.
Sold for $5,312 (includes buyer’s premium) at Doyle in 2017
A RUBY MOURNING LOCKET CLIP BROOCH in 18ct yellow gold, designed as a window frame jewelled with rubies, the central hinged window panels opening to reveal locket compartment with engraved question mark, French assay marks, 3.7cm, 20.4g.
Sold for £950 at Elmwood’s in 2020
MARIANNE OSTIER DIAMOND CLIP-BROOCH Designed as a stylized wreath, the center set with a ribbon of baguette and tapered baguette diamonds, within a frame of round, marquise and pear-shaped diamonds, signed Ostier-Inc, with maker’s mark; circa 1955.
It sold for 20,000 USD at Sotheby’s in 2020