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.

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.

An Art Deco aquamarine and diamond brooch, the baguette shaped aquamarine is millegrain set between two diamond set flower-head sections within rectangular diamond set border.

An Art Deco aquamarine and diamond brooch, the baguette shaped aquamarine is millegrain set between two diamond set flower-head sections within rectangular diamond set border.

Art Deco. Three Gemstone and Diamond Brooches -- Platinum, Amethyst, Sapphire and Diamond. c1930.

Art Deco. Three Gemstone and Diamond Brooches -- Platinum, Amethyst, Sapphire and Diamond. c1930.

A tourmaline and diamond brooch  The heart-shaped pink tourmaline, within an old brilliant, single and rose-cut diamond ribbon and garland surround, old brilliant and single-cut diamonds approx. 0.30ct total, length 3.9cm, fitted case by Tessier, New Bond Street. Edwardian or Edwardian style or earlier.

A tourmaline and diamond brooch The heart-shaped pink tourmaline, within an old brilliant, single and rose-cut diamond ribbon and garland surround, old brilliant and single-cut diamonds approx. 0.30ct total, length 3.9cm, fitted case by Tessier, New Bond Street. Edwardian or Edwardian style or earlier.

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

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

An art deco sapphire and diamond brooch, circa 1930 The openwork shield-shaped…

An art deco sapphire and diamond brooch, circa 1930 The openwork shield-shaped…

A Belle Epoque opal and diamond brooch, circa 1905. The single-cut diamond tied ribbon bow suspending an old brilliant-cut diamond and a circular cabochon opal with a single-cut diamond border, mounted in silver and gold, detachable brooch fitting. #BelleÉpoque #brooch

A Belle Epoque opal and diamond brooch, circa 1905. The single-cut diamond tied ribbon bow suspending an old brilliant-cut diamond and a circular cabochon opal with a single-cut diamond border, mounted in silver and gold, detachable brooch fitting. #BelleÉpoque #brooch

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