Show Your MetalFrom right: Platinum Asscher-cut diamond bracelet, price upon request, by Daniel K, danielk.net. Platinum-and-diamond bracelet, price upon request, by Fred Leighton, fredleighton.com. Gold and rose-cut diamond necklace, price upon request, by Stephen Russell, stephenrussell.com. Middle: Gold and 18th-century rose-cut-diamond, pendant-style necklace, by Renee Lewis, $39,000, at Barneys, barneys.com. Front, from bottom: Platinum Asscher-cut and pavé diamond earrings, by Daniel K, price upon request, danielk.net. Platinum rose-cut diamond earrings, price upon request, by Renee Lewis, at Barneys, barneys.com. Flocon gold-and-diamond earrings, $8,000, by Van Cleef and Arpels, vancleef-arpels.com.