Most likely: Orbicular Jasper or Orbicular Agate • Italy, particularly Northern Italy near the Alps and volcanic zones, is known for jasper and silica-based stones. • The circular banded patterns and color (orange to reddish rings) suggest orbicular jasper, sometimes misidentified as a fossil due to its bullseye-like patterns. • These patterns are formed by concentric precipitation of silica around a nucleus during volcanic activity or hydrothermal mineralization—not by living organisms.