Cool Nodule!

The rock in the image appears to be a type of agate or jasper with interesting inclusions. The coloration and patterns suggest it could be a form of "Chicken Blood Stone" or "Cinnabar Agate," which is known for its red inclusions due to the presence of cinnabar. The white and yellowish areas could be agate or other forms of chalcedony, which often have such colorations due to different mineral inclusions and impurities. These types of rocks are valued for their vibrant colors and are often used in jewelry and decorative items.