London Blue Topaz Graceful Allure Pendant Necklace in solid sterling silver. Size: 6.4 x 25.4 mm (0.25 x 1 in). Material: Sterling Silver. Total metal weight: 4.32 gr. Marquise cut London blue topaz (12 x 6 mm) = 1.75 ct total. Colour: Blue. Stone cut: Marquise Cut. Occasion: Mother's Day. Anniversary: 4th Anniversary. Birthstone: November.