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Opal Polisher Wheel Cabbing Machine Set Grinder Sander Gem Faceting 7 Speed for cutting & polishing Gems gemstones and opals Making Faceting (121) $ 122.34. FREE shipping Add to Favorites ... Opal Cabbing Machine, 6" 1/4HP 1800rpm Efficient, Lapidary Rock Grinder Polisher With Lamp & Water Pump, Gem Faceting Machine (121) $ 3,238. ...