Under Field Guide tfc:mechanics/gems it states:

Through 'Sluicing' and 'Panning', 'Cut Gems' can be obtained.

However upon checking loot tables for both Panning and Sluicing, all drops are "tfc:ore/*" instead of "tfc:gem/*" as expected (based on the Field Guide).

While looking at the loot tables, and checking recipes, it came to me that "Cut Gems" are not obtainable in the game? I may be missing some other mechanic, but at the very least the Field Guide is inaccurate about getting "Cut Gems".

Checked on:
Forge (1.20.1 - 47.2.23)
TFC (1.20.1-3.2.0) and (latest 1.20.1-3.2.1)