A crinoid fossil.
A nautilus shell. Probably not a fossil, as they still exist today.
It seems that this shell is the preferred object to be recorded by holographers.
I have another example here (yes, they are different).
A pack of shiny fossil ammonites shells.
This last one was still in its original package, so I guess that's the name of the company which produced them: "Lazer Wizardry, Colorado, USA".
If you know any more of them, I'm interested.
