Ammonite Fossil Split in Golden Calcite

A split ammonite fossil rests on a rough wooden surface, its spiral chambers filled with bright golden calcite crystals. The specimen sits in deep shadow, illuminated only by a cool rim light that traces the jagged edge of the rock against a dark background. Overcast winter skies filter a faint, blue twilight through the nearby window, casting a diffuse glow across the uneven texture of the calcite. The shallow depth of field blurs the surrounding wooden table, drawing attention to the sharp, crystalline geometry of the fossil's interior. Fine dust motes float in the dim air, catching the faint light near the calcite's fractured edge.