SHAY GREEN AMETHYST & DIAMOND GEM NECKLACE Details: 18-karat gold Diamonds: approx 0.09 cts Green Amethyst: approx 3.7 cts Natural stones only GEM DROP COLLECTION: The SHAY Green Amethyst Gem Drop Necklace. Standard Length: 14-16.5in Product Number: SN648 Looking for something bespoke? Contact us . Slight variations in color, shape, and size are part of their beauty.