Stein and Felsen both translate to stone in English, but are they interchangeable? When I google images for both, I get mostly small palm-sized stones for Stein and something that I would call boulder for Felsen. Also I saw in my text-book expressions like:
Dieser steile Felsen ist sehr imposant.
but nothing with steiler Stein, which might signify that der Felsen are generally big in size.
So my question is: Can I translate Felsen with boulder and Stein with a small stone?
Please refrain from going into scientific definitions. This isn’t geological question. I just want to know how native speakers perceive the difference.