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Thread: Hard Rock Pocket Gold

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  1. #16

    Jun 2017
    57
    45 times
    Quote Originally Posted by smokeythecat View Post
    All good advice. An assay will give you the real dirt on it.
    Haven't had it professionally assayed yet. Home fire assay gets a hit which is encouraging.
    Click image for larger version. 

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    this is the resulting prills from two assays of the same sample. Don't have a scale that weights to the milligram.

    Used
    15 Grams Sodium Carbonate
    25 Grams Borax
    10 Grams Litharge
    5 Grams KNO3
    5 Grams flour
    40 gram sample

    Melted to liquid until it didn't bubble anymore, collected and cupeled the lead.

    Got one prill measuring 0.384mm the other 0.336mm

    Sample was from a little scoop off the top of the sack of millings I have for the material from that site. So a pretty homogeneous mixture of the last 15 pounds that I ran through the rod mill. Click image for larger version. 

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    Assembler and Aufisher like this.

  2. #17

    Apr 2013
    224
    114 times
    All Types Of Treasure Hunting
    How big is the bead?
    Aufisher likes this.

  3. #18

    Jun 2017
    57
    45 times
    Quote Originally Posted by StreamlineGold View Post
    How big is the bead?
    Don't have a milligram scale. Used digital calipers took five measurements of each averaged than and got one prill measuring 0.384mm the other 0.336mm

  4. #19
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GMT, DFX, Coinmaster, TDI-SL, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
    2,092
    2085 times
    Prospecting

    If my math is correct, the bigger prill is about .000569 grams, roughly 2.4 cents worth at $1,330/oz...Nice!
    Jim
    Last edited by Jim in Idaho; Jan 20, 2018 at 12:40 PM.
    Clay Diggins and Twobrothers like this.

  5. #20

    Jun 2017
    57
    45 times
    Quote Originally Posted by Jim in Idaho View Post
    If my math is correct, the bigger prill is about .000569 grams, roughly 2.4 cents worth at $1,330/oz...Nice!
    Jim
    If it was all gold anyway. Need to rustle up some nitric acid.

    So at 0.000569 Grams out of a 40 gram sample that's:

    0.000569g/40g = x/1,000,000g (1 metric ton)

    X=14.225 Grams of silver-gold doré per tonne (1,000kg) or

    0.000569g/40g = x/907184.7grams (USA short ton)

    X= 12.904 Grams per USA short ton aka
    0.415 ozT silver-gold doré per short ton

    Thanks. Where did you get the mm to prill weight estimation info?
    I tried to do it once based on the area of a sphere and the density of different blends of silver gold alloys and came up with around 1/3 oz of silver-gold fore per ton assuming a 60:40 silver gold ratio (prill is basically silver colored).

  6. #21
    us
    Period Six Mining and Exploration LLC

    Mar 2015
    Sonoran Desert of AZ
    348
    423 times
    Prospecting
    Quote Originally Posted by Twobrothers View Post
    Don't have a milligram scale. Used digital calipers took five measurements of each averaged than and got one prill measuring 0.384mm the other 0.336mm
    Milligram scales won't get you close enough for realistic measurements. You need a microgram scale and those are dang expensive. You're talking about north of $5000.00 for a good one. Hence, send it all off to a certified assayer.
    This ain't Michigan, its GOLD COUNTRY!

 

 
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