A spinning diamond-shaped black and white object seen transversing the sky over a 2 minute periodI work as a security guard at a American/Israeli natural gas company - just south of Tel Aviv. It was about 19:20 in the evening, a few moments before sunset - the sky was still light. I was doing my rounds and I happened to look up at the sky when I first saw it.Looking towards the west, I noticed a small black object high in the sky. It was moving towards the east in a straight line and what appeared to be a constant speed. I first thought it might be a bird, but as it got nearer I noticed it had no wings. Its shape also became more apparent as it approached. It had the appearance of a diamond lying on its side. The back half was black, but the front half was white and the latter appeared to be spinning on its axis. I could see its shape quite clearly since it was not to high up - below cloud level, and it passed right above me. It was absolutely silent. After about two minutes it disappeared towards the east - still travelling at a constant speed and in a straight line.Since I work near Israel's only meteorological station, I'am familiar with their weather balloons which I can see being launched. I often track them as the rise up, and under certain conditions - like sunset, they can have the appearance of a flying saucer. I also work near our country's only international airport, and low-flying aircraft on takeoffs and landings are a familiar sight to me. What I saw was not a aircraft, helicopter, balloon or kite. I cannot explain what I saw and this fact has been bugging me ever since. What kind of diamond-shaped object can fly - let alone make no sound? I constantly see the object in my minds eye and I'am stumped as to what it was.I took 3 pictures with my cellphone camera, but the camera was low quality and all you can see is a small black dot with a white tinge to it. My celllphone doesn't connect to a computer, so I sent it to a friend via SMS who will transfer it to a computer and then email back to me so that I can enlarge it a bit. I was the only witness, but the object came from the Tel Aviv area so others may have seen it - so far nothing has appeared in the local press/media.I will email the pictures as soon as soon as I can.I should mention that the object was about the size of a car and appeared to be on a preprogrammed flight path. I considered the possibility of a drone of some unusual shape - but why would someone fly a experimental drone over a populated area and near an airport with low-flying planes? What if it crashed or fell to the ground? My friends thought I had imagined it, and people smiled at me when I told them what I saw. I know what I saw and I'm not embarrassed to tell people. I found your site on the web and decided to send this report. If there are strange objects flying out there we need to know what they are.