Before there were tables, there were stones. And there were also pretty stones. Sometimes people used stones to make pretty stones prettier.

For your pre-gemology table saves (or post gemology table saves), a Stone To Cut Stones On.

A total of 74 swatches (shown below). Found in Creative Activities, or by searching Gemology or Jewel. 500 Simoleons (cheaper than the original, but still something to spend your money on). Off the grid, same as the original.

A mesh edit of the stone coffee table from Outdoor Retreat, making it into a gemology table. Does not require Outdoor Retreat, just Crystal Creations.

There are 2 medium slots and 4 small slots for deco or whatever fits in them. I would recommend not using move objects near the front of the table, because that area is used by the sims.

Five basic natural swatches:

28 swatches from the Historian palette (https://academiapalettes.tumblr.com/):

28 swatches in the Scientist palette (https://academiapalettes.tumblr.com/):

and 13 more fantastical swatches of my own creation:

Known issues:

Original effects are still present, including modern tools and bright light from the grinder while it's in use. I removed what lighting I could, but that one spot is an effect, not a light.
The grinder looks a bit out of place, but it would look weirder removed, I think, because the animation and visual effects would remain the same.

Stone Gemology Table