Victoria Townsend Genuine Blue Topaz & Diamond, Sterling Silver 18" Necklace and Earrings Set - Set includes pierced earrings, necklace and pendant. The diamond is microscopic - it is just a tiny dot at the top of the pendant - between the blue topaz and the round ring at the top. The blue topaz stones are prong set. The pendant is marked 925 - but the markings are so tiny I could not make out the maker's mark - please see the photos.