Mood: Mystical | Subject: A cascade of geometrically perfect crystals forming a chandelier-like formation in a secluded cavern | Timing: Dusk, as the last rays of sunlight refract through the entrance of the cavern | Lens: Wide-angle | Lighting Conditions: The warm, diffused light from the setting sun piercing the cavern, casting a rainbow of colors on the crystals | Style: Fusion of untouched nature and exquisite geometry | Colors: The dazzling spectrum of colors refracted through the crystals contrasted with the muted browns and greys of the cavern walls | Background: The darker depths of the cavern, adding depth and mystery | Perspective: Low angle, capturing the grandeur of the crystal cascade and the cavernous expanse above | Focal Point: The largest crystal formation, glowing with the full spectrum of refracted light | Space: Expansive, emphasizing the overwhelming beauty of the crystals and the silent majesty of the cavern | Pattern/Texture: The sharp, geometric facets of the crystals contrasted with the rough, natural texture of the cavern walls | Element defining the scale: A solitary stalagmite at the cavern floor, its size providing a sense of the scene's grand scale | Depth of Field: Deep, focusing on the crystal cascade while subtly blending into the cavern's depths | Feeling: Mysterious and awe-inspiring | Contrast elements: The mystical scene of a geometrically perfect crystal cascade in a secluded cavern at dusk, its untouched nature and exquisite geometry enhanced by the refracted sunlight and contrasting textures, set against the backdrop of a mysterious, silent cavern.