6mm Round Cut Aquamarine Halo Pendant NecklaceSpecifications: Metal: 18K Yellow Gold Over 925 Sterling Silver Main Gemstone: Round Cut Aquamarine Main Gemstone Weight: 0. 75ct Main Gemstone Size: 6. 0mm Main Gemstone Colour: Blue Accent Stones: White Topaz Chain: 40cm Sterling Silver What to expect from our Natural Gemstone Jewellery: You can expect only the very best in quality and craftsmanship, and a product which will turn heads wherever you go. Gorgeous and unique, one of a kind designs.