Silver,heart shaped craft flew left to right in front of my car.

I cannot at this time remember exact date of the event since it was so long ago.  This happened in broad daylight.  I thought I was familiar with most aircraft types since I have always been interested in flight and I spent 3 years in a Navy fighter squadron.  This "vehicle" matched nothing a had seen to date.  I thought at first it was a stealth fighter not having seen one at this time.  However, this craft was dull silver metallic in color and was shaped similar to a heart with all rounded contours. It had a small rounded nose like a pencil eraser that extended out from where the point of the heart would be.  It appeared to be made of one piece of "metal", no windows, no vertical stabilizers, no apparent openings or exhaust ports of any kind.  It flew from north to south at approximately 1000' elevation and was about 1/4 mile away from us.  My wife and I both saw it as the same shape and size.  I would say that it was about the size of a small airplane perhaps with a 30' wing span.  It left no vapor trail and I could hear no sound, although I was driving in my vehicle at the time.  After about 2 seconds the trees hid my view of the craft and by the time I was clear again it was gone.  To this day I have never seen or heard of any craft including the now famous "stealth" jets that resemble what I and my wife saw that day.