7.50 Ct Round 9mm Blue Topaz Sterling Silver Dangle Earrings and Pendant Set Beautiful Earrings and Pendant 7.50 Ct 100% Natural Blue Topaz Measurement: 9mm Round Each Gemstones may have been treated to improve their appearance or durability and may require special care. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.