Selective Mineral Jig manufactured in two model M1 and 1015 model .The Selective Mineral Jig is an ideal unit for the batch or continuous test laboratory and for certain commercial applications. This jig has a single hutch compartment and a reversible screen compartment constructed of cast iron so that cyanide solutions can be fed to the unit instead of water when desired. The rotating water valve is timed to admit water only on the plunger upstroke and is located on the end of the eccentric shaft. The eccentric shaft is mounted in a ball-bearing double-pillow-block type bearing. An adjustable eccentric is used for varying the stroke of the rubber diaphragm. The upper trash screen consists of a four mesh woven-wire cloth. Two lower wedge-bar screens are furnished with each jig, one with 2 millimeter openings and the other with 5 millimeter openings to suit various requirements. The jig is mounted on a steel stand which is sufficiently high to permit the use of a one-gallon glass jar attached to the hutch for accumulation of the jig concentrate.The jar allows the inspection of jig product during test.