A praying mantis preserved in amber for millions of years not a sculpture, but a real prehistoric insect trapped in tree resin and fossilized into a natural time capsule.
An entire moment from ancient Earth… frozen before humans even existed.
Check out : https://www.natureknows.org/2024/02/30-million-year-old-praying-mantis-is.html
The premise is wrong, though. Resin tends to be acidic. You know what doesn't like acid treatment? Chitin, on account of being a polysaccharide.
And even - or especially - if the resin was perfectly neutral, it would slowly suck the fats stored in the insect's tissues out of the same.
Plus the O~2~ that's slowly diffusing in - and out - of the resin will, especially in connection with sunlight, decompose more and more stuff.
Whatever the decomposition processes are, you can see an orange-tinted sort of halo around the mantis. That's the mixing zone - mantis molecules, meet resin molecules.