A diamond brooch-pendant  designed as a bouquet of round brilliant, marquise, pear and baguette-cut diamonds; estimated total diamond weight: 18.00 carats; mounted in platinum.

Diamond Brooch-pendant - 18 cttw - bouquet of round brilliant, marquise, pear and baguette-cut diamonds - mounted in platinum

A SAPPHIRE AND COLORED DIAMOND BROOCH, BY OSCAR HEYMAN & BROTHERS  Set with a pavé-set yellow diamond bombé pistil, extending three tiers of marquise-cut sapphire petals, to the gold and diamond stem, with circular-cut diamond leaves, mounted in platinum and 18k gold By Oscar Heyman & Brothers

Sapphire and Coloured Diamond Brooch by Oscar Heyman & Brothers set w a pavé-set yellow diamond bombé pistil, extending three tiers of marquise-cut sapphire petals, to the gold and diamond stem, w circular-cut diamond leaves, mounted in platinum and gold

Victorian Amethyst and Diamond-Set Brooch/Pendant. This regal, ravishing brooch/ pendant combo radiates with a luscious deep purple Siberian Amethyst, weighing 17.75 carats. The majestic gemstone is set in a yellow Gold bezel and is fancifully framed in sparkling flowers and flowing ribbons of old mine-cut Diamonds. This magnificent jewel is finely handcrafted in Platinum over 18k yellow Gold and is fitted with its original removable pin mechanism. French hallmarked. •$ 11,750.00 #brooch

Victorian Amethyst and Diamond-Set Brooch/Pendant. This regal, ravishing brooch/ pendant combo radiates with a luscious deep purple Siberian Amethyst, weighing 17.75 carats. The majestic gemstone is set in a yellow Gold bezel and is fancifully framed in sparkling flowers and flowing ribbons of old mine-cut Diamonds. This magnificent jewel is finely handcrafted in Platinum over 18k yellow Gold and is fitted with its original removable pin mechanism. French hallmarked. •$ 11,750.00 #brooch

A CONCH PEARL AND DIAMOND BROOCH/PENDANT, BY HARRY WINSTON   Of foliate motif, the leaves set with old-cut diamonds, enhanced by nine conch pearls, 6.2 cm, with French assay mark for gold, in navy blue leather Harry Winston pouch  With maker's mark HW for Harry Winston

Harry Winston brooch/pendant of foliate motif, the leaves set with old-cut diamonds, enhanced by nine conch pearls, cm, with French assay mark for gold.

AN ART DECO DIAMOND BROOCH, BY BOURDIER PARIS, CIRCA 1920. Designed as a ribbon bow, pavé set throughout with diamonds and set with a line of baquette cut diamonds to the centre knot, mounted in platinum, signed Bourdier Paris, with French assay marks. #Bourdier #ArtDeco #brooch

Stunning Circa 1920 brooch designed as a ribbon bow, pavé set throughout with diamonds and set with a line of baquette cut diamonds to the centre knot, mounted in platinum, signed Bourdier Paris, with French assay marks.

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Diamond Spray Ornament, maker unknown, about Museum no. © Victoria & Albert Museum, London- cushion cover - black velvet background with diff stitch for silver flowers

A Belle Époque diamond brooch, by T.B. Starr & Co, circa 1915. The circular…

A Belle Époque diamond brooch, by T. Starr & Co, circa The circular…

An Antique Platinum, Gold, Ruby, Pearl and Diamond Brooch.

An Antique Platinum, Gold, Ruby, Pearl and Diamond Brooch.

A diamond brooch, circa 1955. The three strands of brilliant and baguette-cut diamonds arranged in the form of a knot and tassel, around a central brilliant-cut diamond, principal diamonds weighing 1.40, 1.26, 1.20 and 0.98 carats, remaining brilliant-cut diamonds weighing approximately 4.50 carats total, baguette-cut diamonds weighing approximately 4.00 carats total, length 7.0cm.

A diamond brooch, circa The three strands of brilliant and baguette-cut diamonds arranged in the form of a knot and tassel, around a central brilliant-cut diamond, principal diamonds weighing and carats, remaining brilliant-cut

CARTIER - AN ART DECO TURQUOISE AND DIAMOND BROOCH, 1930S. The oval cabochon turquoise within a baguette and square-cut diamond geometrical surround, to the triangular-cut turquoise terminals, 6.2 cm, mounted in platinum, signed Cartier London, numbered. #GemstoneBrooches

CARTIER - AN ART DECO TURQUOISE AND DIAMOND BROOCH, 1930S. The oval cabochon turquoise within a baguette and square-cut diamond geometrical surround, to the triangular-cut turquoise terminals, 6.2 cm, mounted in platinum, signed Cartier London, numbered. #GemstoneBrooches

Ruby and diamond brooch #rubyjewelry #DiamondBrooch

Ruby and diamond brooch #rubyjewelry #DiamondBrooch

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