Loose SiC grit grains will flatten and resurface hard stones to the factory orange peel texture. The longer u grind, the finer the finish. So u only need to get the coarse or medium rock tumbler bag. Do not use diamond lapping plate afterwards.

Lapping with coarse SiC grit powder and water on hard flat surface (glass, tile, paver brick) retexturizes hard glazed stones (Arkansas, ceramic, Norton India). https://youtu.be/NLG2N7duwYc Stone Maintenance - Flattening and Conditioning Sharpening Stones [Shapton Pro]. Jef Jewell

Lapping hard oilstone back to Norton factory finish on grit-n-glass. https://youtu.be/CZNUWSY88Og?t=1064 silicon carbide sharpening stone flattening and conditioning under the microscope. Joe Calton

GANGOU $13 https://www.amazon.com/dp/B09X3JJWS8 2 lbs Tumbler Media Grit,Rock Polishing Grit Media, Works with any Rock Tumbler, Rock Polisher, Stone Polisher,MEDIUM 120/220 Silicon Carbide Grit, STEP 2 for Tumbling Stones