Depending on whether you need a small jar for polishing or bulk quantities for sandblasting, you can find aluminum oxide at the following locations:
Amazon.com: Aluminum Oxide. $25 & above. Get It by Tomorrow. Amazon.com Go to product viewer dialog for this item. where to buy aluminum oxide
Central Pneumatic 25 lb. Black Aluminum Oxide 70-Grit Abrasive Media Depending on whether you need a small jar
For rock tumbling, glass etching, or dental work, finer grades are required: Aluminum Oxide - Amazon.com or dental work
