12.8 Lbs Rainbow Arizona Petrified Wood Log Fossil Rare Colors Specimen Uncut July 30, 2023 admin 12.8 Lbs Rainbow Arizona Petrified Wood Log Fossil Rare Colors Specimen Uncut. This is a GORGEOUS piece! Measures approx: 6.5″ x 6.5″ x 5. This specimen has not been cut or polished. We are open to reasonable offers.