Estate Sterling Silver & Blue Topaz Pierced Stud Earrings! 18 This auction is for a lovely pair of preowned pierced stud earrings. These are designed out of sterling silver and feature blue topaz stones. These have a combined weight of 2.2 grams. These could use a gentle polish/cleaning. Very nice. If you have any questions or concerns before purchasing please message me and I will get back with you asap. Thank you!