Q: What’s the best way for fine jewelers to promote ­costume, or fashion, jewelry collections in their stores?     —Donna Hankin, proprietor, Joint Venture Jewelry, Cary, N.C.A: “We have had good sales and a lot of in-store fun with our clients with the costume fashion trends that have been happening. We don’t promote them publicly, but we do enjoy showing and promoting them to everyone coming in. The added benefit is that when our current clients are having fun in the store, they send us many more new clients. Creating a happy, fun store environment is very helpful for business.”—TOM WRIGHT, co-owner, Wright’s Jewelers, Lincoln, Neb.“As a jeweler who mainly carries fine jewelry and watches, costume or fashion jewelry is not a subject we often approach. We do, however, promote some costume or fashion pieces as a beautiful and inexpensive alternative to our