Playful spirit and modern style. The Mimi So 18k Gold Necklace collection features the signature Cloud Opal Necklace, Wonderland Bunny Pendant Necklace, and our classic Letter Pendant Necklaces. Mimi So Necklaces are designed in New York City and are crafted with 18k yellow rose, & white gold, ethically sourced diamonds, and precious gemstones.