Moonstone For Nourishment. Vibrant, unique and full of style, our iconic MV Siren™ collection brings semi-precious gemstones to life for a fresh everyday look. This beautiful MV Siren™ Mini Nugget Cluster bracelet features eight organic shaped, rose cut Moonstone gemstones, in 18ct Gold Vermeil on Sterling Silver and measures 75mm in width and 180mm in length. The chain has an adjustable sliding bead that allows you to adjust its length.