This platinum brooch by Oscar Heyman features 10 emeralds, two blue sapphires, 22 pink sapphires and 81 round diamonds ($46,000).

Oscar Heyman's platinum earrings hold 26 cut-corner square-shaped diamonds and two round diamonds ($69,000).

This platinum brooch by Oscar Heyman features 10 emeralds, two blue sapphires, 22 pink sapphires and 81 round diamonds ($46,000).

Oscar Heyman's platinum ring features a 4.69-carat oval-shaped opal with 10 oval-shaped diamonds ($45,000).

"The Oscar Heyman Entourage Rings with oval diamonds around a central colored stone, pioneered by Oscar Heyman in the 1920s, are always popular," Heyman says.

This platinum bracelet by Oscar Heyman holds 62 rose sapphires, 37 marquise-cut diamonds, 35 round diamonds and three pear-shaped diamonds ($150,000).

This platinum and 18-karat gold Oscar Heyman bracelet features seven opals, 16 emeralds, 23 diamonds and 242 fancy intense yellow diamonds (price upon request).

This platinum and 18-karat gold ring from Oscar Heyman features an 8.48-carat oval-shaped chrysoberyl cat’s eye and eight oval-shaped diamonds ($92,000).

Oscar Heyman's platinum necklace holds 33 oval-shaped sapphires, 32 oval-shaped diamonds and one round diamond ($400,000).

"Our large diamond and colored stone necklaces, these remain top sellers," Heyman says.

These platinum earrings by Oscar Heyman feature fancy colored diamonds ($64,000).

Oscar Heyman’s platinum ring with a 20.47-carat unheated oval-shaped blue sapphire, 10 oval-shaped diamonds and 26 round diamonds ($450,000).

This platinum Art Deco bracelet by Oscar Heyman features approximately 48 carats of "oldeu" diamonds ($220,000).