The grain pattern is somewhat boring when used on the scale of making a pen, which may or not be a factor for you. Not my preference. The oily nature of the wood that contributes to its durability, also makes it resist efforts to glue it to itself or other materials. Years ago, making outdoor furniture from Ipe, the only adhesive I found that would work was a particular brand of epoxy (Sorry, cannot remember the brand, but I think it was sourced from Canada). It might be similar to the Lee Valley product "G-2", which is very expensive.