Hardwood is supposed to be very valuable.
If so, then these petrified stumps are priceless!

This photo was taken by a Hasselblad 500C medium format film camera with a Carl Zeiss Planar 1:2.8 f=80mm lens and Zenza Bronica 67mm SO56•2C(YA3) filter using Rollei RPX 25 film, the negative scanned by an Epson Perfection V600 and digitally rendered with Photoshop.