COMINGS AND GOINGS>>?Blue Nile named veteran retailer Harvey Kanter, 50, its new CEO and president. He was previously CEO of Moosejaw Mountaineering and Backcountry Travel, a retailer of premium outdoor apparel and gear. He replaces interim CEO Vijay Talwar, who was appointed Blue Nile’s general manager and president of its international business.>>?Van Cleef & Arpels CEO ­Stanislas de Quercize will take the reins of Cartier at the end of the year. He will be succeeded by Nicolas Bos, who is currently creative director of Van Cleef & Arpels and CEO of Van Cleef & Arpels North America.>>?Jeff High, founder and president of Gemvision, is joining Stuller’s executive team as executive vice president. High, who will be based out of the firm’s Lafayette, La., headquarters, will coordinate activities between Gemvision and Stuller.>>?The Diamond Dealers