geof_junk Posted January 7, 2020 Share Posted January 7, 2020 If you use the Whink which has Hydrofuoric acid, don't use a glass container.Use a plastic or a mild steel or stainless steel container as the Whink will be diluted/wasted as it attack the silica in glass. By the way it does take a lot of time to dissolve quartz. It is very effective on mill scale and rust. Beware very dangerous acid even at low concentration. Link to comment Share on other sites More sharing options...
RedDirtDigger Posted January 7, 2020 Share Posted January 7, 2020 Nice pieces. Thanks for sharing 2 Link to comment Share on other sites More sharing options...
Popular Post Glenn in CO Posted January 8, 2020 Author Popular Post Share Posted January 8, 2020 When using our VLF detectors the depth it they would achieve was limited. When using our cultivator type rakes we could get more depth in the area we were searching, but the steep angle of the tailing piles would eventually have the over burden from above slide down into the area we were searching. So my Dad came up with an idea to use a "slip scraper" and use the winch on a ATV to move over burden in areas that were no longer producing . We would dig a trench and detect the sides and then rake the dirt that was created from the trench. Doing that technique we were back on the gold again. This was on private property and the altitude, extreme steep terrain didn't allow any heavy type of equipment to be used. Here are some pictures of gold we found with the dirt and mud washed off. The large one in the center of the picture is a 85+ gram crystalline gold specimen. Here are some more pictures of specimens up close after being cleaned. 9 1 Link to comment Share on other sites More sharing options...
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