Anyone Ever Tried Using Screened Black Sands To Tumble Rocks?
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Thread: Anyone Ever Tried Using Screened Black Sands To Tumble Rocks?

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  1. #1

    Mar 2005
    Canada
    Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
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    Anyone Ever Tried Using Screened Black Sands To Tumble Rocks?

    The black sands, especially the black magnetic particulate, screened down to 100+ mesh looks like it might be useful for tumbling/polishing stones. Anyone ever tried it or heard of anyone using it? Or at least to begin the first stages before the 600 grit polish?

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    Wife + 4 kids (no grandkids yet)Orthopedics RN, photagraphy,writer, build electronic gizmos, previous hot air balloon pilot, coin collector for 40 years.

    "METAL DETECTING IS A HOBBY AND HOBBIES ARE MEANT TO BE ENJOYED"

  2. #2
    us
    May 2014
    AZ
    Beach High Banker, Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and home made fluid bed and stream sluices.
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    Check this article out. https://rocktumbler.com/blog/can-i-u...stead-of-grit/. The hardness of magnetite, which is what black sand is largely comprised of, is 5.5 to 6.5 on the Mohs scale so seems not to be a good choice.
    russau likes this.
    If it can't be grown, it must be mined!

  3. #3
    us
    May 2014
    AZ
    Beach High Banker, Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and home made fluid bed and stream sluices.
    2,075
    2988 times
    Prospecting
    On the subject of black sand...and gold, here is a presentation by one of your fellow Canadians that may be of interest to you. https://open.library.ubc.ca/cIRcle/c...tems/1.0223469. Go to page 37 for pictures, methods, etc. There is also a lengthy thread on this forum if you want to see forum members discussions on the subject. Simple solution to fine gold recovery.
    Last edited by arizau; Jan 04, 2019 at 12:02 PM.
    If it can't be grown, it must be mined!

  4. #4

    Mar 2005
    Canada
    Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
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    Quote Originally Posted by arizau View Post
    Check this article out. https://rocktumbler.com/blog/can-i-u...stead-of-grit/. The hardness of magnetite, which is what black sand is largely comprised of, is 5.5 to 6.5 on the Mohs scale so seems not to be a good choice.
    Makes sense, although, there is a high percentage of garnets in some locations, with a nice pink color of some cons. Of course, garnets have a hardness of 1 -2 point better then the magnetite, again, making that concentrate mixture kind of useless.

    Thanks for the response!
    Wife + 4 kids (no grandkids yet)Orthopedics RN, photagraphy,writer, build electronic gizmos, previous hot air balloon pilot, coin collector for 40 years.

    "METAL DETECTING IS A HOBBY AND HOBBIES ARE MEANT TO BE ENJOYED"

  5. #5

    Mar 2005
    Canada
    Garrett- Master Hunter CX,Infinium, 1350, 2500, ACE 150-water converted 250, GTA 500,1500 Scorpion, AT Pro
    3,894
    2505 times
    Quote Originally Posted by arizau View Post
    On the subject of black sand...and gold, here is a presentation by one of your fellow Canadians that may be of interest to you. https://open.library.ubc.ca/cIRcle/c...tems/1.0223469. Go to page 37 for pictures, methods, etc. There is also a lengthy thread on this forum if you want to see forum members discussions on the subject. Simple solution to fine gold recovery.
    That milling procedure is most interesting, yet quite successful. Thanks for that link. Articles like that can keep a grown man awake all night thinking!
    Wife + 4 kids (no grandkids yet)Orthopedics RN, photagraphy,writer, build electronic gizmos, previous hot air balloon pilot, coin collector for 40 years.

    "METAL DETECTING IS A HOBBY AND HOBBIES ARE MEANT TO BE ENJOYED"

  6. #6
    us
    Nov 2010
    High Rockies
    GB2
    97
    96 times
    All Types Of Treasure Hunting
    I just did a test using the magnetic fraction of my black sands hematite/magnetite to tumble polish gold nuggets.
    I made a video about it. The results were not what I had expected but I guess they do make sense.

    For rocks, could work as a pre polish/ not too aggressive to knock off sharp edges and such on softer rock

    Last edited by CGC Miner; Jan 12, 2019 at 08:11 PM.
    winners58, russau and Asmbandits like this.

 

 

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