Scientific cross-section illustration of a geode revealing intricate crystallineine druse formation with quartz point clusters, amethyst and calcite mineral layer banding, iron oxide oxidation rings, and hollow cavity structure on aged cream paper, handwritten Latin annotations describing each mineral deposition phase and geode formation mechanism, measurement scale in centimeters along the edge, soft geological laboratory spotlight from upper left casting delicate prismatic shadows, museum archive quality, Pantone-accurate deep violet-purple crystal points with golden-brown iron staining highlights and cream calcite layer accents, composition dynamically centered to showcase the geode's 200-million-year-old geological elegance, mood: mineralogical precision capturing crystalline wonder, hyperrealistic details of crystal point terminations and mineral layer interface patterns visible