Silver Diamond object flashing or reflecting light from sun randomly

Watched the diamond object float or hover, tracking toward the East (toward Washington DC). Object was redirected back to the South East towards Manassas, VA. Object flashed or reflected the sun randomly (but very bright like a camera flash). I was able to see it through my polarized glasses, but could not capture the object on film using a Samsung Ultra do to the random pattern.
A flight at about 30-60,000 feet flew over approximately 10 minutes later on the exit path of the object. A military helicopter flew toward Dulles airport in the same area from the West (e.g., I-81 corridor) a few minutes after witnessing the plane. I could not validate the flight path of the plane or military helicopter.