A gorgeous opal doublet of sky blue, pink, green peach and azure is set in 18k gold atop a baseplate of 22k gold/argentium sterling silver bi-metal. This bi-metal is a layer of 22k gold fused to a base of argentium sterling silver--the look and warmth of gold at far less cost. Chain is 18k gold and measures 18 inches. The pink tourmalines and pearls are wrapped with 18k gold headpins.