Our Hamsa Round Necklace is made with Iolite and 18k gold. Here to protect and bring you all the luck (and adoring looks). 18k Gold Plated Stainless Steel Twelve, 3mm x 3mm Princess cut Iolite gemstones Pendant is 13.6mm round, 1.5mm thick One, 2.20mm Brilliant cut Iolite gemstone Necklace is 16" (40.5cm), extends to 18" (45.5 cm)