“For precious metals we either buy outright, but a lot of times people opt for a trade in, which gives them an extra 10 percent more for the item(s) sold. Typically, we sort pieces by precious metal types and karatage, and then weigh the item. We then plug in the pennyweight of each item(s) into a formula using the day’s spot prices. If customers want gemstones that we aren’t interested in buying, we’ll remove those as well. For diamonds we typically buy at weights of half-carat and larger, but will purchase smaller sizes in complete jewelry pieces that we’re buying.