Ross-Simons - 11.00ct t. w. London Blue Topaz, .14ct t. w. Diamond Drop Earrings. For an extra fancy touch of sparkle and color, slip on these extravagant drop earrings in sterling silver. Ovals and pear shapes of 11.00 ct. t. w. London blue topaz are highlighted by .14 ct. t. w. diamond frames. Hanging length is 1 1/8". Post/clutch, diamond and blue topaz drop earrings. Blue Topaz birthstones are the perfect gift for December birthdays.