Blue Bracelets

Gem set and diamond bracelet by Bulgari.

An art deco sapphire and diamond bracelet, circa 1925.

A belle époque enamel bracelet by Lucien Gautrait, circa 1900.

A belle époque sapphire bracelet by Lucien Gautrait, circa 1900.

A cat's eye alexandrite and diamond bracelet.

A diamond and aquamarine bracelet, in the collection of Queen Elizabeth II.

A diamond and sapphire bracelet, for sale by Circa.

A gold, silver, enamel, ruby and diamond bracelet, mid 19th century.

A platinum, 18 karat gold, sapphire and diamond bracelet by Oscar Heyman and Brothers.

A platinum, aquamarine, and diamond bracelet, circa 1960.

A platinum, sapphire and diamond bracelet.

A platinum, invisibly-set sapphire and diamond bracelet by Aletto Brothers.

A platinum, sapphire and diamond bracelet, circa 1935.

A platinum, sapphire and diamond bracelet by Cartier, circa 1925.

Art Nouveau Pendants

An art nouveau pearl, ruby, emerald, diamond and platinum pendant, circa 1920.

An art nouveau gold, diamond, and enamel pendant by René Lalique, 1898-1900.

A gold, enamel and diamond pendant.

A chalcedony, gold, and horn pendant by George Pierre, circa 1910.

A plique-à-jour enamel pendant by Lucien Gautrait for Boucheron, after 1890.

An enamel, emerald and diamond pendant by Masriera Y Carrera, circa 1915.

An enamel, sapphire, cultured pearl and diamond pendant by Masriera Y Carrera.

An enamel, seed pearl and diamond pendant by Masriera, circa 1910.

An natural pearl, enamel and diamond pendant necklace, circa 1900.

Turquoise Necklaces

A 14 karat white gold, turquoise, emerald, sapphire and diamond necklace, the clasp of which can be worn as a brooch.

An 18 karat white gold, platinum, turquoise and diamond necklace by Van Cleef & Arpels.

An 18 karat gold, platinum, turquoise, ruby and diamond necklace by Bulgari.

A gold, enamel, turquoise and diamond necklace in the form of a serpent.

A lapis lazuli, turquoise and diamond scarab beetle "Ramses" necklace by Cartier.

A silver-topped gold, turquoise, colored stone, pearl and diamond necklace in the form of a serpent, 1840.

A turquoise and diamond necklace, Bulgari, 1970s.

A turquoise and diamond necklace.

A turquoise and diamond necklace by David Webb.

An art nouveau style turquoise, natural pearl, enamel and diamond pendant by Gautrait, circa 1900.

A turquoise, moonstone, onyx, enamel and diamond necklace/bracelet combination.

Art Nouveau Brooches and Pendants

An 18 karat gold and enamel pendant-brooch by Joë Descomps, circa 1900.

An 18 karat gold and plique-à-jour enamel brooch by Joë Descomps and Leon Gariod, circa 1900.

An 18 karat gold, enamel, natural pearl and diamond pendant, attributed to Joë Descomps, circa 1895-1910.

An art nouveau gold, enamel and pearl brooch by René Lalique, circa 1900.

An art nouveau diamond brooch, French.

An art nouveau gold, enamel, diamond and pearl brooch-pendant by Louis Aucoc, France, circa 1901-1902.

An art nouveau plique-à-jour enamel brooch by Lucien Gautrait, made after 1890.

A art nouveau pearl, diamond and enamel pendant, circa 1900, by Beaudoin.

A gold, enamel, turquoise, abalone pearl, and mother-of-pearl bodice ornament, by Georges Fouquet, Paris, circa 1900-1901.

A diamond, pearl and enamel pendant, circa 1900.

An enamel art nouveau pendant-brooch by Georges Fouquet, late 19th century.

An enamel, diamond, and gem set pendant brooch by Mitsuo Kaji.

An enamel, glass and diamond brooch by René Lalique, circa 1900.

A gold, turquoise, enamel and diamond pendant-brooch by G.R. Sanoz, circa 1900.

A gold, pearl, diamond and enamel pendant-brooch, France, circa 1900.