I saw a movie when I was a child; I was born in '73.
These aliens looked like rocks and lured people in and would eat people's faces when they got too close to them. I believe the rocks were blue.
There was one specific scene, closer to the end I think, and there was a guy on the beach who saw one of these rocks and walked up and looked into it and he was pulled in and the rock ate his face.
It's been so long and I checked Night of the Comet, and The Monolith Monsters (that was black and white, mine was in color) and the people were not in space suits; it was Earth.
Anyone?