Diamond shaped, very large with four lights. Moved slowed, even seemed to hover.Very large craft that I thought at first was an airplane. But moved too slow, even seemed to stop at one point, and was HUGE. Then saw move "sideways," very low in the sky, and took a path no plane has taken to airport in this areas. Had what appeared to be three lights at first, but when moved to side, could see at least 4 lights and they light up bottom side of biggest thing in the sky I have ever seen. It seemed very close to me and made an odd, low rumbling noise, but not very loud, and did not sound like airplane engines.