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  1. Hello, I was just wondering if anybody remembers a gold assay kit that was sold that used a full size microscope to do the assay. I remember seeing this in the icmj between 5 and 7 years ago. All I do remember is that the material could be panned in the field and the concentrates could be examined in the field with a full size microscope and that it came with a booklet explaining how to do the test.