After sanding some small pieces of wood for a project today I noticed my hands turned purple and was hard to wash off. The wood is unknown and was given to me by a friend who's dad had planned to use it for a rifle stock. Supposedly it's the same wood that was used on Weatherby rifle stocks over 50 years ago. The wood is dark brown in color and has a pronounced open grain, hard as a rock too. Sanding gives off a light brown dust. Any idea what type of wood this might be?