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A Cut Above - Black Starr & Frost Amethyst Brooch. A medium deep-hued amethyst of 28.5 carats (24 by 18 mm) is scalloped along the edges in an overall oval form... Of platinum filigree with minute mille grain (beaded edges) it is set with 19 diamonds, with a total weight of just shy of 1 carat (.90 carats of antique diamonds.)  c 1925

A Cut Above - Black Starr & Frost Amethyst Brooch. A medium deep-hued amethyst of 28.5 carats (24 by 18 mm) is scalloped along the edges in an overall oval form... Of platinum filigree with minute mille grain (beaded edges) it is set with 19 diamonds, with a total weight of just shy of 1 carat (.90 carats of antique diamonds.) c 1925

Estate Black, Starr & Frost Antique Emerald & Diamond Bracelet l Betteridge

Estate Black, Starr & Frost Antique Emerald & Diamond Bracelet l Betteridge

A BELLE EPOQUE PEARL AND DIAMOND CHOKER NECKLACE, BY BLACK STARR & FROST  Of foliate design, centering upon a pierced collet-set diamond lacework plaque, to the seed pearl latticework choker, decorated with old European-cut foliate trim, mounted in platinum, circa 1905, 13¼ ins.  Signed B. S. & F. for Black, Starr & Frost

A BELLE EPOQUE PEARL AND DIAMOND CHOKER NECKLACE, BY BLACK STARR & FROST Of foliate design, centering upon a pierced collet-set diamond lacework plaque, to the seed pearl latticework choker, decorated with old European-cut foliate trim, mounted in platinum, circa 1905, 13¼ ins. Signed B. S. & F. for Black, Starr & Frost

A pair of Art Deco diamond earrings with faceted demantoid garnet spacers in platinum collet settings with 14K white gold screw back findings. Black, Starr & Frost.

A pair of Art Deco diamond earrings with faceted demantoid garnet spacers in platinum collet settings with 14K white gold screw back findings. Black, Starr & Frost.

Sapphire and diamond cluster ring by Black Starr & Frost, circa 1920. Ornate pierced out cluster ring set to centre with an oval old cut sapphire weighing approximately 1.10ct in a millegrained rub-over setting.

Sapphire and diamond cluster ring by Black Starr & Frost, circa 1920. Ornate pierced out cluster ring set to centre with an oval old cut sapphire weighing approximately 1.10ct in a millegrained rub-over setting.

Antique Cabochon Amethyst and Diamond Pendant-Brooch, Black Starr & Frost   Platinum, gold, one round cabochon amethyst ap. 18.5 x 18.8 mm., rose-cut diamonds, signed B.S. & F., c. 1900

Antique Cabochon Amethyst and Diamond Pendant-Brooch, Black Starr & Frost Platinum, gold, one round cabochon amethyst ap. 18.5 x 18.8 mm., rose-cut diamonds, signed B.S. & F., c. 1900

Art Deco Brooch, Carved jade, marquise-cut diamond, half moon-cut diamond,  diamond and platinum brooch. Black, Starr & Frost.Nelson Rarities, Inc., Portland, Maine

Art Deco Brooch, Carved jade, marquise-cut diamond, half moon-cut diamond, diamond and platinum brooch. Black, Starr & Frost.Nelson Rarities, Inc., Portland, Maine

1stdibs.com | An Impressive Gold Enamel Diamond & Ruby Suite, Verger for Black Starr & Frost

An Impressive Gold Enamel Diamond & Ruby Suite, Verger for Black Starr & Frost

1stdibs.com | An Impressive Gold Enamel Diamond & Ruby Suite, Verger for Black Starr & Frost

Ceylon bleu sapphire cushion diamond

Ceylon bleu sapphire cushion diamond

Anello con rubino e diamanti di Edmond Chin

Anello con rubino e diamanti di Edmond Chin

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