I have found a stack of walnut that was cut into 2.5"-3"thickness x9"w x 7'-8' long pcs. 30 years ago. It was originally intended to be used for gun stocks. It has been in a barn stacked in a pile with spacers in between each row. Is this walnut something rare and special due to it's age or is it just a pile of walnut? Thanks in advance for any input.