Ross-Simons - 10.00 Carat Sky Blue Topaz Y-Necklace in 14kt Yellow Gold. 18". Add a dash of elegance to your day with this stunning Y-necklace. A 10.00 carat pear-shaped sky blue topaz is eye-catching beneath 3-4mm gold spacer beads stationed on a 14kt yellow gold rope chain. Springring clasp, sky blue topaz Y-necklace. Blue Topaz birthstones are the perfect gift for December birthdays. Topaz Birthstone, Gold Rope Chains, Gold Sign, Sky Blue Topaz, Necklace Necklace, Topaz Stone, Swiss Blue Topaz, Timeless Jewelry, Drop Necklace