Platinum over Sterling Silver Northern Lights MYSTIC TOPAZ Stud EarringsNorthern Lights Mystic Topaz Stud Earrings Made with . 925 Sterling Silver 1 Stone Per Earring , and are 4 Prong Set Solitaires The Mystic Topaz Stones are Round Shaped 6mm and Faceted Stone The Approx. Topaz weight is 1. 720 cts , Thats . 860 cts Each Earring Approx. Total Product weight is . 1. 6 gms The Topaz is Coated with a Mystic Treatment So the Topaz Gives Off a Northern Lights Color Effect , Which Gives Off a Rainbow of Colors These Earrings