Round Slab of Travertine 48" Diameter

Looking to pack and ship a 48 inch diameter, about 1- 1.5inch thick Round Slab of Travertine, approximately 250 lbs in weight, shipping to us in Maui, HI, 96761. Will need your advice on how it should be packed/crated? No urgency on dates to pick up and deliver, but pick up could be as soon as October 2, and delivery date is not critical within reason. Please let me know what other details are involved to get an estimate on cost for this project. Can take photos and send asap. Thanks so much! Tim Bruns