Tanzanite earrings in solid 14k gold and platinum. Tanzanite's violet-blue shifts with the light, and this collection runs from a petite everyday stud and a trillion to a 6.5 mm round hero, oval and floral studs, hoops, and diamond-framed pairs for dressing up. Tanzanite is softer than sapphire, which is why we set so many as protected studs and hoops, and every pair is made to order and ships fully insured.