The Premium Solitaire necklace suspends a single round brilliant diamond from a fine 18K gold chain, with nothing else on the chain to compete with it. Approx. 0.40 ct certified diamond and 3.10 g of solid 18K gold (750 hallmark), in yellow, rose or white gold, with a certificate of authenticity. At 0.40 ct it carries the same stone as the Drop Solitaire on more gold — 3.10 g against 2.50 g — so the pendant sits more solidly on the chain. A round brilliant returns more light than any other cut for its weight, which is what lets a single stone this size read from across a room. Adjustable from 36 cm to 39 cm. Product Details Length36 cm / 14.2 in · 37.5 cm / 14.8 in · 39 cm / 15.4 in 18K Gold WeightApprox. 3.10 g Diamond WeightApprox. 0.40 ct Clasp18K gold clasp with three openings for precise size adjustment