Plume Agate, a variety of chalcedony prized for its three-dimensional, feather-like mineral inclusions that resemble organic "blooms" or fiery landscapes. The vibrant orange and red plumes are typically formed by iron oxide minerals like hematite, while the intricate, tree-like black dendritic patterns consist of manganese oxides. These minerals precipitated within a silica gel before it hardened, leaving them suspended in a translucent matrix that gives the stone its characteristic depth. Based on its specific combination of flame-colored plumes and dark, mossy structures, this piece is visually consistent with high-quality material from famous American localities such as the Woodward Ranch in Texas or the Cady Mountains in California.
Ian
A great result!
Ian