This wall chart contains superbly detailed photomicrographs showing internal features observed in natural, treated, and synthetic sapphires. Published in the Summer 2017 issue with the article by Nathan D. Renfro et al., ìInclusions in Natural, Synthetic, and Treated Sapphire,"
Vibra-Sonic tumblers have a unique movement that produces both a rotary and vibratory tumbling action which reduces processing time of stone or metal compared to ordinary tumblers.