0.50 carat total weight Gemstones. London Blue Topaz : 6 pieces, Round Shape, 2.50 mm. Gemstones have a nice color. Pendant measures 3/4 x 1 inches and weighs 5.68 grams. Retails for $59.99Pendant features top quality workmanship and a beautiful finish. Includes a 18 Italian Sterling Silver Box Chain, a $9.99 value. Pendant is in pure Sterling Silver and stamped .925.