Sandstone, I think. It's actually amazing the variety of different kinds of rock you see when you take a walk under a sea cliff and actually
look. I was thinking that I only ever really
look at things when I have a camera...
Now that I think about it, the last one might have encrusted salt on it. Here's one that definitely does. The salt was actually glowing a little, I'll have to work on it a bit..
Pareidolia... pareidolia... will take a while to remember that one!