This is a method I’ve come up with on how to synthesize fish fossils at home. Time and pressure are all you really need. The question becomes how much time, and how much pressure. I’ve never seen experiments like this anywhere, but this shows you a method of how to make real fish fossils in your basement. Or you back yard.

Note, if the matrix freezes the ice crystals will destroy it. It cannot freeze. It need to remain wet. Since I’m not able to achieve pressure high enough to generate cementation in the sediment, the best I can do is compact it. So once it dries and is removed from the flask It is still fragile.