46 Silicon Carbide - Tumbler Grit Grit:46 grit Description: Core Drills are best

Description: Core Drills are best suited for a drill press and are great for hollowing out the inside of stone ring shanks

Quantity: 5 Mandrels

Approximate size for 1 piece: 6cm x 5cm x 3cm

a scientist’s intellect

46 Silicon Carbide - Tumbler Grit Grit:46 grit Description: Core Drills are bestDescription: This is 46 grit silicon carbide grit meant for tumbling gemstones. It can also be used for flat lapping. Silicon Carbide is the most effective and best bang for your buck when it comes to any generic lapidary abrasive media. It is not sandblasting grade, it is lapidary grade. I personally do not recommend this for tumbling, as the particles are so large that when I wash my rocks off in a mesh screen to clean them after the initial