Grey sludge that sticks to magnet from lakes?
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  1. #1
    Aug 2019
    Bounty Hunter quick draw pro
    55 times
    Metal Detecting

    Grey sludge that sticks to magnet from lakes?

    Have any of you come across this grey sludge that sticks to your magnet from the bottom of a lake?

    What is it??

  2. #2
    Dec 2007
    Whites Goldmaster GMT, GMII,Whites Sierra Super Trac, Ace250, Teknetics Gamma 6000, Whites Pinpointer,Garrett Pro Pointer II
    1024 times
    Metal Detecting
    Magnetite. In Colorado dredgers call it black sand. It is an iron compound.

  3. #3

    Nov 2012
    1411 times
    All Types Of Treasure Hunting
    I use liquid car wax on my magnet and this helps to prevent rust plus makes it much easier to clean that type of contaminate.

  4. #4
    May 2011
    tujunga ca
    xlt mxt gmz and now a gmt whites
    1512 times
    would try to rap it with rubber,



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