Fundamental Rockhound Products: 2 lb 4670 Extra Coarse GRIT for Rock Tumbling polishing Silicon Carbide

The Fundamental Rockhound Products 2 lb 4670 Extra Coarse GRIT for Rock Tumbling polishing Silicon Carbide is a great product for those looking to quickly get rid of the outer undesirable layer of really rough hard stones like agate. Although it may be pricey for the amount of product, customers have reported that it works well for their needs. The only downside reported is that the grit tends to accumulate and clump up in the bottom of the barrel, which requires frequent checking to ensure proper tumbling.