Osage Orange heartwood is golden to bright yellow, which almost certainly ages to a darker medium brown with time: primarily due to exposure to UV light. Working this wood can be difficult due to its hardness and density, though it is reported to have little dulling effect on cutting edges. It turns well, and also takes stains, glues and finishes well. Pen Blank approx. 5/8" - 3/4" square x 5" - 6" long.