Rare Cycad Polished slab Colorado. Rare Cycad “monanthesia” Dakota Sandstones San Miguel county, Colorado 11″×11.75 and 1.25″ thick. Rare fern from cretaceous era, large miror polished rip cut. This specimen has been stabilized before polishing. Has great color and structure. A great addition to any collection. The item “Rare petrified Cycad Polished slab Colorado” is […]