Thanks Rick. It's not a burl but this wood (Japanese Horse Chestnut) has a lot of that look in it. It's not the easiest wood to work with, but it finishes well. It's not a hard wood, but it has an odd toughness to it.
I like to play around with wood when I get a little downtime, but I don't have a workshop so I just use hand tools (files, knives etc) to craft brushes. I always have a few on the go, but don't get them finished very often due to being busy with other stuff. This is some wood that I found that I thought would look good as a brush handle so I grabbed a small slab of it. There are a few more in the works from the same slab. The wood is Japanese Horse Chestnut.
The winner is @Lancre Congrats. Please send me your postal details so I can get the brush on its way to you.