In order to make stamps to stamp cookies for a baker friend, I took a branch of an old apple tree out of my garden, carefully dried for a few years.
She wanted a triskell & an ermine, the branches having two ends, I engraved the patterns on the same piece of wood.
and just so that you have an idea of the size of the patterns (4cm in diameter) and the depth of the engraving (1cm), a small bias photo
The bad news is that my dremmel (which would have allowed me to do this in 1 hour) is seized and so I did everything with manual gouges.
The good news is that I only cut myself twice, I’m making a lot of progress in wood engraving: -D