Pure Grown Diamonds CEO Lisa Bissell has left the company after two years, a spokesperson told JCK. Formerly known as Gemesis, the privately held company based in New York manufactures Type IIa, gem-quality laboratory grown diamonds and manufactures jewelry. Bissell’s two-year contract had ended, the company said, while not providing any details on her replacement. It also said that it has taken on 35-year industry veteran Alan Cohen as vice president of sales. Pure Grown Diamonds director Suraj Mehta said in a statement that vice president of sales Gary Coleman and Alan Cohen would be supported by the Pure Grown Diamond team at its New Jersey office, and that it planned to "aggressively pursue our current trajectory" and would some announcements at the upcoming JCK show.