What fossils can't be kept at home?

You can put it, nothing to say.

Conch fossils refer to biological remains and movement traces formed in the prehistoric geological history of human beings, including plants, invertebrates, vertebrates and other fossils and their traces.

It is a verification of the history of the earth and a scientific basis for studying the origin and evolution of organisms. Conch fossils are different from cultural relics. They are the main geological relics in China and precious non-renewable natural heritage.