In one sentence, describe what the following article is about:

Some sites only accept returns within a limited amount of time after the date of sale, so it's important to find out how long you will have to return or exchange your purchase. Make sure the online jewelry store has customer service representatives available to answer questions or to help you with your order. Warranty options are a sign of a reputable jewelry vendor and will be beneficial if you ever need to repair or service an item. A jewelry site that has lots of positive customer feedback and return customers is likely to be a reliable source. Some jewelry sellers will offer discounts in addition to the discounted price for purchases that exceed a specific amount. These kinds of discounts can be great when purchasing gifts or complete sets. Some online sites will offer cleaning and maintenance on fine jewelry, including stone polishing, clasp tightening or ring cleaning, for no extra charge to customers.

Summary:
Find out about the site's return and exchange policy. Look for customer service. Ask about warranties. Read customer reviews. Determine whether you can get extra discounts. Inquire about service options.