That is perfectly fine with me.
The reason why I started this topic is that in my 30 years in construction (mostly in english speaking countries) I have never ever heard someone talk about a road or track having a “pebblestone surface”, and that is why I was wondering about this tag. If people like to use it in OSM that is fine, no wahalla. I am not demanding anything here, just to find out the thoughts of other mappers in regard of this issue.