The petrified trees of the Arizona desert are fossil wood of an American tree, the Araucaria with the widest range of colours. The latter were brought by the richness of the minerals present in the soils during their change of state from wood to stone, mainly iron oxidation which gave all these reds. But it is also those which have been the most tormented, traveling in the rivers, colliding with each other and then crushed by heavy masses of sediment. The hardness is such that the shafts are often so cracked that the polishing of these plates is very long and requires a lot of patience and expertise. This Mesozoic piece is a cut from a nearly 225 million year old fossil Araucaria. The back of the tree is reinforced with fiberglass.
Really good condition