1 7/8 TCW Oval-Cut Genuine Blue Sapphire and Diamond Accent 18k Gold over 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) Sapphire is a precious gemstone available in an array of colors, most popular in a hue of deep blue. Ring Style: Classic A sumptuous display of midnight blue sapphires, 1 7/8 carats T.W., and diamond accents creates a ring of exceptional beauty. You'll want to wear it day and night. 18k gold over sterling silver. Sizes 5-10.