silverskin below it, exposing green coffee beans. These are ready for roasting, grinding and brewing. Are all beans created equal? Not according to the experts. Kona Coffee is graded... and valued according to the shape and size of beans. In 1999 the Hawaii Legislature passed a bill requiring all green coffee leaving Kona to be certified and classified according... to the following strict standards. All beans must be clean, with a moisture content of 9-12.5%. Imperfections are full imperfections per pound of green coffee. Size classification...