Reply To: Polish for Beryl › Forums › Polishing › Polish for Beryl › Reply To: Polish for Beryl December 30, 2019 at 1:03 pm #5977 davidecholsParticipant @davidechols Matrix and cerium is the best and quickest I have found. On a 12mm stone it takes approximately minute and half for table and 15 seconds for each facet at medium slow speed. I use the red cerium. Good enough for the opal cutters in Australia.