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home made metal detector for rock quarry, process crusher,, home made metal detector for rock quarry 88 Views The Zenith is the professional mining equipments .... metal detecting around old granite quarriesHow To Make Your Own Detector Lapidary World. How to make your own detector 101 etching for the next step employ a liquidtight plastic tray one inch of depth more or less will be fine an old soup bowl can also be pressed into service but dont use a metal tray and dont use a container that is cracked or chipped the tray need not be more than an inch larger …
