PalmBeach Jewelry 4.50-Carat Genuine London Blue Topaz 18k Gold over .925 Sterling Silver Ring FREE SHIPPING on orders of $30.00 or more - Top Rated Seller - Trusted Since 1952 - 90 Day Guarantee - Easy Returns - Free PalmBeach Jewelry Gift Box 18k Yellow Gold Over Sterling Silver - Quality Stamp (.925) 4.50 carat 11x9mm Oval shaped center stone Ring Style: Classic The steely splendor of London blue topaz... Round twinkling diamond accents highlight the coveted, deep blue color of the 4.51-carat London blue topaz center stone to create a stunning arrangement of sparkle and glamour. Set in 18k gold over sterling silver. Sizes 6-10.