Most of my sculptures are carved with my mark; this was developed during idle time when I worked as a Letter carver. It is a reverse R using the upright of the letter T which is counterbalanced with a C. These are my full initials, my middle name being Trevor.
Although not a masons mark as such I have always signed important pieces with it; sometimes the signature becomes a prominent part of the artwork.
A piece of green Borrowdale series slate has a large mark carved into it rather than leaving an open gilded facet.
In one large concrete sculpture I have taken the whole of the forward aspect and carved my mark deep into the concrete which had the result of creating a face or huge head.