Show Me the Silver!If a new silver line is on your shopping list, you’ll want to check out these three brands debuting at JCK Las Vegas. One is a higher-end extension line from a manufacturer, one is an independent designer, and another features updated classics with a modern finish—but all will appeal to a wide range of consumers shopping within a price point.RevabellaAttentive jewelry buyers may recall seeing or reading about this newer collection earlier this year, but if not, you’ll have a chance to see the Great Neck, N.Y.–based line in the Design Center. Co-­presidents Robert Namdar and Eli Hemati will be on hand to talk through the sterling and black rhodium-plated line featuring patented laser cuts for sparkling effect, as well as single-cut diamonds and some sapphires. The firm, which launched in 2010, currently has 27 U.S. accounts, including Vogt’s Jewelers in Allen