Hydrology’s Aqua Jewels collection, including faucets, tub fillers, and shower systems, will make your bathroom glitter like a jewelry store. Dutch designer Marcel Wanders’s handles (made from brass and available in a polished chrome or gold finish) are faceted in exactly the same proportions as a round, brilliant-cut diamond. Shown here, a polished chrome faucet, $775, at Hydrology, 435 N. LaSalle St., 312-676-3747; hydrologychicago.com