Modern Rock Tumbling

This is the brand new rock tumbling book written by Steve Hart. It is full of explanatory color photographs, as well as numerous tables and charts designed to help both the beginner and the experienced tumbler operator understand modern rotary and vibratory methods of tock tumbling. Clear photos and descriptions of tumbling abrasives and polishes are presented for maximum clarity, and the terms `particle size', `hardness`, and `toughness` are thoroughly explained.