| Wet/Dry Operation | Wet |
|---|---|
| Abrasive Material | Aluminum Oxide |
Check the listing for details. 4 Ounces of Lapidary Tumbling 500 Grit Aluminum Oxide. Condition: New. Listed at 9.95 USD. Then walnut shell or cerium oxide to finish the polish. Featured here is a 4 ounce bag of 500 grit aluminum oxide. This is a grey grit. Start off with and aggressive grit such as 80 for the inital cutting.