Swiss Blue Topaz Leverback Earrings set in Sterling Silver 1ct tw Total Gem Weight: 1 ct tw .925 Sterling Silver Rhodium Finished Leverbacks Stones: 6x4mm Blue Topaz Earrings measure just over 3/4 inch top to bottom including the stone. Total Gem Weight: 1 ct tw .925 Sterling Silver Rhodium Finished Leverbacks Stones: 6x4mm Blue Topaz Earrings measure just over 3/4 inch top to bottom including the stone.