Gemstone type: 9 pieces of oval shape genuine tanzanite. Total carat weight: 1.70 ct. Each stone measures approx.: 5 mm (L) x 4 mm (W) and 4 mm x 3 mm Accent stone type: 8 pieces of round shape genuine white topaz. Total carat weight: 0.08 ct. Accent stone measures approx.: 1 mm (L) x 1 mm (W) Total measures approx.: 13 mm (W) OR 1/2" (W) This piece of jewelry has 925 Trademark.