I am rather new to rock tumbling and used a 1200 fine aluminum oxide polish and feel like the majority of my rocks (especially the amethyst) lost that lustrous look they had

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Rock Tumbling Grit – Two Pack Step #4, Polish 1200 Fine Aluminum Oxide

500 Aluminum Oxide Grit - The Rock Shed

Some Polished Great, Some Came Out So-so, Do I Re-polish, 58% OFF

Rock Tumbling for beginners, using Aluminium Oxide grits and save money on your tumbling.

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Best Polish?? Rock Tumbling Hobby

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Rock Tumbling for beginners, using Aluminium Oxide grits and save money on your tumbling.