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Thread: What to do with these rocks?

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  1. #1
    gb
    Jun 2019
    South Wales
    18
    14 times
    All Types Of Treasure Hunting

    Lightbulb What to do with these rocks?

    Just come back from a weekend away with the missus, and we went to Dolaucothi Gold Mines i South Wales, UK on the Saturday. Whilst there, we did the Roman tour where they took us up the hill and explained about all the Roman workings there and we got to go into the mine itself.

    The tour guide said that basically, the gold that comes from Dolaucothi is very very fine almost like dust. But some alluvial gold can be found in the Cothi river. She went on to say that the Romans looked for the quartz veins within the rock, and that the best of these are 'a dirty quartz' which has all iron and heavy impurities in it. She showed us a sample of it and the quartz did in fact look 'rusty' with all sorts going on in it. This apparently is the rich ore that contains the gold.

    Later on, we did a bit of gold panning which was fun. They put little bits of iron pyrite in so kids can have a go at finding little bits of gold! We were told though, that as the troughs are filled with water from a mountain stream, microscopic gold does get washed down into the troughs. After doing some panning, the missus was better at it than I was!

    After getting rid of the pyrite, we were able to find really small gold. So small it was virtually like a dust. Too small to get out of the pan or separate from the black heavies mixed with it.

    Is it possible to remove this small gold from the black stuff? Also, after leaving I was bursting for a pee and had to stop in a lay-by after we'd sat in the car after closing time to eat our picnic. In the lay-by were quite a few of these dirty quartz rocks, just like the ones the guide showed us.

    They are now in the back of my car, do I grind these down then pan them? Or do I do something else to them?

    So many questions, so sorry!

    David.
    DizzyDigger and RTR like this.

  2. #2
    us
    Feb 2015
    Moses Lake WA & Provo UT
    397
    523 times
    Prospecting
    Yes, crush and pan just like you said. Hopefully, you have some gold! There are better ways to extract the gold from the powder you can make that involve chemicals or melting but they wouldn't be practical for your purposes probably.
    vasquez109 likes this.

  3. #3
    us
    Oct 2009
    8,588
    7462 times
    All Types Of Treasure Hunting
    Yep, crush and pan. The romans were most likely using a furnace to melt the dust into beads big enough to work with.

  4. #4
    us
    Mine President, XPBC, GIH, stamp mill operator, snuffer bottle owner.

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
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    You can get the fines out by screening down your black sands so everything is roughly the same size then it will pan out alot easier as the gold will be the heaviest thing in there.

  5. #5
    us
    steve andermatt

    Apr 2013
    California
    AT GOLD/Garrett /Garrett pro pointer/ 5x8 double d coil and sniper coil/Lesche digger
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    Use a magnet in a plastic bag to remove the black sands the black stuff is probably iron which is magnetic.
    vasquez109 likes this.
    back of the boat

  6. #6
    gb
    Jun 2019
    South Wales
    18
    14 times
    All Types Of Treasure Hunting
    What is the easiest way of crushing the rocks and how fine do I go? Am I looking for powder fine or still with small bits in it?

    Thanks.

  7. #7
    Charter Member
    us
    Roger

    Nov 2017
    Smith Mt. Lake Va.
    Teknetics Liberator Falcon MD-20 *********** Blue Bowl Angus MacKirk sluice Miller Table
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    Only takes a few minutes to turn 5 to 10 pound rocks into sand using a 6 pound sledgehammer head. Just cover the rock (to stop pieces from flying all over the place) and use eye protection. Click image for larger version. 

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    If your gonna pan it,classify the material first.That will help in recovery,a lot.The pile closest to you in the 2nd. pix. is around 100 mesh size.........
    Good luck
    Also for that 'fine' gold .Put a couple drops of Dawn liquid dish soap in your gold pan.Otherwise that gold WILL float away .
    Last edited by RTR; Jun 19, 2019 at 07:24 AM.
    vasquez109 likes this.

  8. #8
    us
    Oct 2009
    8,588
    7462 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Back-of-the-boat View Post
    Use a magnet in a plastic bag to remove the black sands the black stuff is probably iron which is magnetic.
    If you have magnetic sands (not all black sands are magnetic) this is great for reducing your final concentrates, but take time to COMPLETELY dry everything out first, and then spread it out into a single layer (not a pile). You can pull gold onto the magnet if you dont, because it will get stuck to the black sand by water adhesion.

  9. #9
    gb
    Jun 2019
    South Wales
    18
    14 times
    All Types Of Treasure Hunting
    Thanks everyone. Will let you know how I get on with it on the weekend. Will take some photos!

  10. #10
    Charter Member
    us
    Nov 2012
    Maryland
    XP Deus, Tesoro Cibola
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    I bought a hand rock crusher off Ebay for about $30 that keeps all the stuff in the container and does very well.

  11. #11
    us
    Mar 2015
    Whites Coin Master, Whites Gold Master GMT, Whites MXSport High banker/dredge, DIY hand trommel, DIY Miller table, DIY fluidbed gold trap sluice, Keene A-52 A-52s 1862 Wheaties
    926
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    prospecting, metal detecting
    Quote Originally Posted by smokeythecat View Post
    I bought a hand rock crusher off Ebay for about $30 that keeps all the stuff in the container and does very well.
    Got a picture of that?

 

 

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