Manganese Iron Oxide Dendrites on Limestone - Stone Tree Rock

Manganese Iron Oxide Dendritic Limestone from Graham County Arizona. Dendrites are also called "stone trees" as their unique patterns look like tree branches. These aren't fossils, they are manganese iron deposits that crystallize when water seeps into fissures in layers of rock such as Quartz or Limestone. Measures approximately 3 inches x 2 inches x 1 inch. Smoke free home.