Sapphire & Tsavorite 18k Gold Vespa Stud EarringsBased in solid 18 karat gold, these bee shaped earrings are brought to life with diamond embellished wings and an array of rainbow hued gemstonesincluding tsavorites, rubies and sapphires. From Nelly Rojas's Royal Bugs Collection, charmingly lifelike pieces that celebrate the significant yet often overlooked role of insects. Post back closure 18k yellow gold, emerald (dot), tsavorite, ruby, multicolor sapphire and diamond Carat: 0. 01 ctw emerald, 0.