A square, professional audiobook cover image (1024x1024) in a realism-infused, slightly dramatic style. The central image is a single, perfectly formed pearl, glowing with an inner iridescence. The pearl is resting on dark, wet sand, with subtle ripples of seawater just receding from its surface. The background is a blurred, dusky sky, transitioning from a deep indigo at the top to a muted, earthy ochre near the horizon line. Hints of distant, rugged coastal cliffs are barely visible, adding a sense of isolation and hardship. The overall mood is one of profound beauty juxtaposed with a sense of underlying tension and foreboding. The lighting is dramatic, with the pearl casting a subtle, soft shadow on the sand. The color palette is rich and muted, dominated by deep blues, earthy browns, pearlescent whites, and subtle hints of amber and gold in the pearl's glow. The composition is focused tightly on the pearl, emphasizing its significance and the stark beauty of its surroundings.