Agate sea sponge in Jurassic chert

This is a unique specimen of a fossil agate marine sponge that was found in Jurassic sediments that formed hundreds of millions of years ago. The sponge was preserved in stone form, where it gradually mineralized layer by layer, forming a beautiful agate pattern.

Its pinkish-purple coloring is also special, which gives the sample an aesthetic value. The sponge is the result of a process where layers of skeletons were deposited in the sea, which were gradually mineralized.