18-karat yellow gold, Gemfields Zambian Emeralds and diamond necklace Designer Gargi Rathi's lifelong admiration of Gemfields Zambian Emeralds informs House Of Meraki's elegant pieces. This 18-karat gold necklace is strung with a vivid oval-cut Zambian variety that's beautifully framed by hand-cut diamonds. It's destined to become a treasured family heirloom.