Natural Stone: Gem-Quality Swiss Blue Topaz AAA Grade Size: 6 x 6mm, 1.18ct Ring: Silver925, 18KGP Silver925 stamp present. Ring size is free size. Recommended for sizes 8-11. Brazilian blue topaz, with excellent clarity and cut. As this natural stone is of a quality used in jewelry at jewelry stores, you can bring it to a jewelry store as a loose stone if you get tired of the design, and enjoy it through remodeling, etc. Please handle with care as it is a very delicate piece.