Rainbow Moonstone Necklace | Moonstone Necklace | Electroformed copper crystal necklace | Moonstone Crystal Necklace. A large moonstone teardrop cabochon has been electroformed and strung on a 30" copper chain. Every stone is as unique as the person it will adorn. Please allow for differences in color, shape and size. Each piece is handcrafted in my tiny island studio on Martha's Vineyard. It comes ready for gift giving in hand-stamped, earth conscious packaging.