Like most prominent online jewelry stores, Kay supplies a vast assortment of fine pieces for both men and women. Kay has a feature-rich website and comprehensive customer service options to make shopping for quality fashion jewelry online convenient and enjoyable.

This online jeweler has a seemingly endless assortment of pearls, diamonds and other popular gemstones. It offers pieces made from precious metals such as platinum, sterling silver, and white and yellow gold.

When most people think of fine jewelry, they think of women's jewelry, such as engagement rings, diamond earrings and statement necklaces. But Kay provides men's jewelry and accessories as well, including watches, wedding bands and cuff links.

Kay is committed to selling only conflict-free diamonds. This means that the diamonds this online jeweler sells have been vetted and verified to come from legitimate sources, not from conflict-riddled regions or war zones.

This online jeweler doesn't have the wide selection of corporate gifts that some competitors do – think leather goods, engraved key chains and desktop accessories. Despite its large product selection, Kay doesn't offer many products suitable for co-workers or clients.

Kay offers all the services and features found among the best jewelry websites, including free gift wrapping, engraved products and gift cards. All diamonds this online jeweler sells are certified, so you know exactly the quality of the diamond you are purchasing. For shoppers on a budget, Kay has a clearance section of discounted pieces, and its comparison-shopping tool allows you to compare similar products side by side.

This online jewelry store offers in-house financing and customizable jewelry. Kay's customized jewelry includes an array of items you can personalize, from monogrammed cuff links to a completely custom bridal set.

If you are unhappy with your purchase from Kay, you can return or exchange it within 60 days. This online jeweler offers a range of shipping options, including overnight delivery. Kay doesn't provide Saturday delivery, nor does it require a signature upon delivery for orders less than $500. Kay also doesn't insure shipped orders. Rather, the carrier insures each package.

Kay Jewelers offers comprehensive customer service options. For starters, the Kay website has an education center brimming with informative articles, including a jewelry glossary, a diamond guide and jewelry care how-to guides. The jewelry website provides order status updates so you can track your package from time your order is placed to when it's delivered to your front door. You can also contact the company directly via email, telephone and live chat.

Kay Jewelers offers a large selection of jewelry for both men and women, plus it offers in-house financing, so you don't have to pay the full cost of the piece outright.