Rare Parker Colorado Petrified Wood Polished Slab. Very Rare Slab of Petrified Wood from Parker, Colorado. This slab has a very high quality mirror polish. It made it quite difficult to even take pictures because of the reflections. This is a lovely piece. The colors and patterns are magnificent. The spot with crystallization is the cherry on top in my opinion. The piece measures 6″x4.5″ and is about 1/4 thick. Weighs 174 grams/ 6.14 ounces.