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

An art deco sautoir and pendant watch

J.E. Caldwell

An antique gem-set heart pendant locket on a pearl set gold chain

A late 19th century ruby and diamond crescent pendant

A Diamond Cluster Pendant

An early 20th century scroll and pear shaped diamond pendant