Sterling Silver 16.3-Carats Quartz,12.8-Carats Aquamarine, 0.1-Carats Aquamarine and Freshwater Pearl PendantMaterial: Genuine Sterling Silver (925 silver, 92. 5% silver content) Stone(s): 1 genuine quartz (16. 3 carats), 1 genuine rough aquamarine (12. 8 carats), 1 genuine aquamarine (0. 1 carats), and 1 genuine freshwater pearl Overall Dimension (including bail): 2. 0 x 0. 8 x 0. 55 inches Inner Bail Diameter: 5 mm Weight: 17. 5 grams Stamp Mark: Starborn, 925 Serial Number: p31125 Aquamarine, along with emerald, is a gemstone variety of the silicate