You generally have to have a resale license to get in. Businesses can get badges for their employees and if you have a friend in the trade they can sometimes give you one of their company's allotted badges. Since there is a fee associated with the badge purchases, there aren't a lot of extra ones floating around. Because of the nature of the show security is REALLY tight. Getting in there is not easy.
I'd love to go too, but wouldn't feel comfortable asking my jeweler to give me a badge.