Costco sells diamonds with a cut grade of Good to Excellent. Although treating diamonds is an accepted practice among many jewelers, Costco only sells natural and untreated diamonds.

Browse Costco's collection of engagement rings, from classic solitaires to unique multi-stone and three-stone designs.

Costco offers our members high quality jewelry at an exceptional value. Our team of GIA Graduate Gemologists inspect every diamond to ensure it meets Costco's strict quality standards.

Shop stunning diamond jewelry at Costco. Find rings, necklaces, earrings, and more at unbeatable warehouse prices.

Costco offers a dazzling selection of rings in every style, from traditional to contemporary. You’ll find high-end diamond rings and one-of-a-kind rings, as well as popular fancy colored diamond rings.

Shop high quality diamonds at Costco. Discover stunning diamond rings, earrings, and more at unbeatable warehouse prices.

General Costco Jewelry and Watch Information Jewelry selections may vary by season and availability. Please click here for the most current availability on Costco.com. Select jewelry may be available at …

Browse our varied selection of bands, for both men and women, including classic gold and platinum, or bands with special detailing like intricate filigree work, or diamond inlay. Whatever your choice, you’ll …

Discover beautiful bridal & wedding ring sets, engagement rings, and unique one-of-a-kind rings at Costco. Find your perfect ring today!

Browse our impressive inventory, which includes diamond earrings in various sizes, cut combinations, and price points. Whether you’re looking for sleek diamond stud earrings, yellow diamond Halos or …