It's sculpture - plain and simple.

I wouldn't dream of telling Julian how to tune a guitar - though I might relate the Viv Stanshall neck capo joke - nor would I tell Hob how to hold the attention of a class of fidgety students, so I dislike others telling me what's what about rude stonemasonry. (I've only been doing it 40+ years).

This stone has been laboriously carved.