On April 16, 2021 we (the team from Carved.com) took 20 different raw wood burls and gave them away as redeemable NFTs on NonFungiBurls.com. If you own the NFT (and it's unredeemed) you can redeem it to get the matching physical burl shipped to your door. Each wood burl has an NFC tag you can scan with your phone to view it's permaweb page.