I was super skeptical at first, as this looks too pristine and like someone added a paint wash.
But a commenter on the other posts kept mentioning Crystal World Australia and that it was from their owner's FB. So I went sleuthing, found the guy, and searched their posts.
Found an album of the process, so if it is faked they went all in. > At first I thought this was a different specimen, but at closer look it appears they removed individual fossils. I still think they likely added a paint wash though, to make the details pop.
They linked to the album on Facebook. But since /r/pics doesn't allow links to Facebook, here it is on Imgur. It had the following information:
December 7, 2017 ยท
Jimbacrinus bostocki, a Crinoid fossil mortality plate from Western Australia prepared in our workshop.
BillyWitch-Doctor on February 20th, 2020 at 19:37 UTC »
You're telling me that DIDN'T come from space?
CaptainFrugal on February 20th, 2020 at 19:50 UTC »
The matrix robots??
Spartan2470 on February 20th, 2020 at 20:42 UTC »
Per /u/Day_Bow_Bow over here:
They linked to the album on Facebook. But since /r/pics doesn't allow links to Facebook, here it is on Imgur. It had the following information: