Genuine Tanzanite Lever-Back Earrings in Sterling Silver Amanda Rose Collection. $49.95. Sterling Silver Lever-backs. Genuine 6 x 4mm Tanzanite stones.. Please see image number 2 for earring lenght. All of our diamond suppliers and MLG state that to the best or their/our knowledge that all of our diamonds are conflict free.. Earrings measure just over 3/4 inch, top to bottom. Save 50% Off!