Dark mysterious underwater scene, black sea agate gemstone, surrounded by glowing bioluminescent fish, eerie blue-green light, delicate seaweed swaying in the current, ancient sunken shipwreck in the background, rusty anchors and cannons covered in coral, schools of small shimmering fish darting through the wreckage, intricate rock formations, misty fog rising from the seafloor, cinematic composition, high contrast, dramatic spotlight, 3D rendering.