Botryoidal Glow!

This rock appears to be an example of an open geode. Geodes are typically characterized by their hollow or partially hollow interiors, which are often lined with crystals or minerals. Here's why:

Texture and Appearance: The rock in the image has a rough exterior with a somewhat nodular surface, which is typical for geodes. The interior seems to contain a liquid or a crystalline substance, which is consistent with the internal structure of many geodes.

Possible Mineral Content: The yellowish-brown coloration and the appearance of liquid or crystalline material suggest the presence of minerals like quartz or calcite, which are common in geodes.

Formation: Geodes form when gas bubbles are trapped in volcanic rocks or sedimentary layers. Over time, minerals precipitate from water seeping through the rock, lining the cavity with crystals.