caption: The image shows a large rock on a black stand with a black background. The rock is a brachiopod, a type of fossilized ammonite, which is a large, oval-shaped shell with a smooth, glossy surface. It has a distinct pattern of ridges and grooves along its surface, and its color is a light grayish-brown. The stand is a dark black color, providing a stark contrast to the rock and making it stand out.