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Thread: Gold vein in the Raw

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  1. #1

    Oct 2007
    609
    118 times
    Banner Finds (1)

    Gold vein in the Raw

    Vein of gold in a mine not too far from Black Canyon City...and this is in an old peralta mine....they didn't get all the gold....untouched by modern man...dbClick image for larger version. 

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  2. #2
    Charter Member

    Jun 2015
    4,999
    18977 times
    Happiness
    That is pretty.

  3. #3
    Charter Member
    us
    Rook

    Nov 2013
    Mississippi
    XP Deus
    5,534
    5238 times
    All Types Of Treasure Hunting
    When you gonna get it?
    When you come to a fork in the road, take it.

  4. #4

    May 2005
    St. Louis, missouri
    5,695
    4233 times
    I sure could use one like that! Congratulations !

  5. #5

    Sep 2018
    18
    12 times
    All Types Of Treasure Hunting
    What is the blue?

  6. #6
    us
    Brian

    Mar 2014
    Central Oregon Coast
    Whites GMT Garret fully underwater
    862
    1999 times
    Prospecting
    Often such vein gold was left on purpose. If the ore structure was determined to be necessary to maintain the structural integrity of the tunnels/shafts it was often left.


    Bejay
    KevinInColorado likes this.

  7. #7
    Charter Member
    us
    Nov 2010
    The Great Southwest
    3,184
    9183 times
    Prospecting
    The blue is the mineral Chalcanthite. It's a copper mineral commonly found in abandoned copper mines. It forms when water passes through the copper and dissolves the copper sulfate. The copper sulfate is redeposited on the walls of the mine as Chalcanthite.

    Heavy Pans

  8. #8

    Sep 2018
    18
    12 times
    All Types Of Treasure Hunting
    Quote Originally Posted by Clay Diggins View Post
    The blue is the mineral Chalcanthite. It's a copper mineral commonly found in abandoned copper mines. It forms when water passes through the copper and dissolves the copper sulfate. The copper sulfate is redeposited on the walls of the mine as Chalcanthite.

    Heavy Pans
    Thanks
    Clay Diggins likes this.

  9. #9
    us
    Gold Tramp

    Dec 2012
    932
    1719 times
    Might be azurite, I see a bit of malachite in the rock.
    And it looks botryoidal ? I think chalcanthite is effervescent ?

    My 2cents.

    Gt.....

    Click image for larger version. 

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    The light blue on the surface here is chalcanthite.

    Click image for larger version. 

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    Azurite / malachite
    Last edited by gold tramp; Oct 12, 2018 at 05:51 PM.

  10. #10
    Charter Member
    us
    Nov 2010
    The Great Southwest
    3,184
    9183 times
    Prospecting
    Chalcanthite is commonly botryoidal and occurs in a wide range of blues. Check out these pictures at Mindat.

    Since Chalcanthite is water soluble and Malachite is not just boiling the rock material will show which of those copper minerals it is. Chalcanthite will dissolve in the water - Malachite will not.

    Azurite is mildly water soluble but it might take a few years to see a difference. Instead of waiting a few years you can put a torch to a sample that appears to be Azurite and it will break down into black copper oxide powder if it is Azurite.

    You can also use fresh dilute nitric acid on the sample. If the material is Azurite or Malachite it will fizz in the acid because they are carbonates. Chalcanthite does not fizz because it's a sulfate.

    Heavy Pans
    Last edited by Clay Diggins; Oct 13, 2018 at 09:48 AM.
    gold tramp, Bejay and 63bkpkr like this.

  11. #11
    us
    Gold Tramp

    Dec 2012
    932
    1719 times
    The samples on mindat, are those some type of morphism, or is it true chalcanthite ?
    I always thought it was a crusty needle like mineral.
    Learn something new everyday.
    Gt....

 

 

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