Hi folks. I had the local tree guy drop off a load of rounds last year, of whatever he happened to have. What arrived was mostly black walnut. Many of my woodworking friends and family have been incredulous that I would burn this wood since it's SO VALUABLE. A few have asked me to save them some rounds so they can create *valuable* woodcrafts with them. Well, they are lucky I haven't done so. About one out of every ten rounds has been filled with nails, and the other day I opened one up that seems to have a piece of metal fence post in it. It looked totally pristine from the outside, and it was only when I plowed the Fiskars into it that the metal appeared. So my question is this: are these precious metals what makes walnut so valuable? If so, I'll take my firewood to the Cash4Gold place and see what they offer.