On March 17, Marvin Beasley, former chairman of ­Helzberg Diamonds, become president and CEO of ­moissanite manufacturer Charles & Colvard Ltd., replacing Randy McCullough, who is retiring. Beasley has served on the company’s board since 2009.JCK: You have been retired since 2009. Is this an interim position?Marvin Beasley: I wouldn’t have taken this if it was an interim thing. I don’t like those kinds of things. I don’t have a time frame. It will take a while to do what I want. Obviously, at 71, I don’t think it’s going to last 20 years. Though my old friend [Berkshire Hathaway vice chairman] Charlie Munger keeps marching on at 91. But I don’t think there are many Charlie Mungers.JCK: What are your goals?Beasley: First, I want to see us produce profitable sales. Obviously, we need to improve our top line. We need to improve our gross margin. We need to improve our me