London Blue Topaz Pendant Necklace in solid sterling silver. Size: 9.7 x 16 mm (0.38 x 0.63 in). Material: Sterling Silver. Total metal weight: 3.67 gr. Pear cut London blue topaz (10 x 7 mm) = 2.25 ct total. Colour: Blue. Stone cut: Pear Cut. Occasion: Mother's Day, Graduation. Anniversary: 4th Anniversary. Birthstone: November.