A chunky gold necklace, 1970s

Cartier

A Victorian amethyst riviere, circa 1890

A Victorian diamond riviere, circa 1890

A gold and diamond necklace

Van Cleef & Arpels

A lapis lazuli, platinum and diamond necklace, circa1935

Cartier

Art Deco platinum and diamond long chain, circa 1920

An early 20th century openwork diamond and platinum heart shaped pendant

An antique diamond riviere with a cluster pendant

An early 20th century platinum and diamond necklace

An early 20th century gold and gem set necklace, circa 1900

Archaeological Revival gold and amethyst necklace, circa 1870

A mid-century diamond riviere necklace

A mid-century baguette cut diamond collar necklace

Mid-20th Century Gold and Diamond Two Row Swag Necklace

An 18k Gold, Diamond, Emerald and Rock Crystal Lariat Necklace

Early 20th Century Platinum and Diamond chain

An antique diamond necklace, mid 19th century

A tubogas chain with diamond set pendant

Bulgari

An early 20th century diamond cross pendant

A diamond flower necklace, circa 1950