Sky Blue Topaz Cushion-Cut Sterling Silver Stud Earrings Set in sterling silver, these sparkling stud earrings highlight checkerboard cushion-cut blue topaz gemstones. Weight: 1 gram Dimensions: 0.25 x 0.25” Stamped: 925 Signed: Yes, unknown maker’s mark Approximate Topaz Diameter: 6mm Backings: Sterling silver butterfly backings Topaz gem tested for authenticity. Sterling silver acid tested for authenticity.