Swiss Blue Topaz Pendant Necklace in solid sterling silver. Size: 6.4 x 16 mm (0.25 x 0.63 in). Material: Sterling Silver. Total metal weight: 4.32 gr. Pear cut Swiss blue topaz (10 x 7 mm) = 2.25 ct total. Colour: Blue. Stone cut: Pear Cut. Occasion: Wedding, Graduation. Anniversary: 4th Anniversary. Birthstone: November.