SiS: MY BEST 10" Arizona FUNGUS INVADED Petrified Wood - Choice Collector Piece!

This is one of the single rarest forms of petrified wood we've had in some time and it is also one of the most attractive mid-size specimens of this sort that you'll encounter.  The strange looking oval shaped patterns framing and permeating this petrified conifer tree are actually the fossil remains of a fungus that invaded this ancient tree before it was fossilized into the gemstone it is today!  I've seen a few pieces of this material over the years, but this is one of finest, most richly colored and complete rounds we've had with this unusual feature.  You won't find a better one in this size range I'm certain!  This is actually a double fossil - the petrified wood being Araucarioxylon arizonacum and the fungus scientists have named Polyporites wardii, a parasite that covered the tree while it was still alive!  The wood in this area is mineralized with silica and other impurities that mean it polishes, but not to the same mirror lustre that it's rainbow wood cousins can achieve.  I