This skull is carved from banded agate, a variety of chalcedony known for its layered bands of color. The alternating light and dark layers form as silica is deposited in rhythmic patterns within cavities of volcanic rock, resulting in unique striping in every piece.nWhy You’ll Love ThisnnMaterial: Banded agate (chalcedony, SiO₂)nSize: Approximately 2 × 3 inchesnAppearance: Polished skull with parallel or curved bands in tones from white and gray to deep browns and blacksnFormation: Develops as silica-rich fluids fill volcanic rock cavities, leaving layered deposits over timenPhysical Properties: Mohs hardness 6.5–7; vitreous luster; fine-grained microcrystalline quartz structurenEducational Value: Demonstrates chalcedony formation, rhythmic mineral deposition, and the durability of quartz-based mineralsnnA striking combination of natural geology and craftsmanship, perfect as an educational specimen or decorative piece.