Specific Gravity Test for Nuggets
(water displacement method)
Ever find a specimen nugget and wonder how much gold it contains?
Jack found this 2 1/2 ounce specimen and we checked it.
It's easy just get a dry weight of the specimen.
dry weight = 50.3 penny weights
What a beautiful nugget!
Then get a cup of water large enough to dip your nugget in on a string to
completely cover it. Then put it on your scales and tare it out to zero.
Next submerge it into the water, don't touch the sides or bottom but get it under
the water. Note the displaced water measurement,
we'll call this wet weight.
wet weight = 10.95 penny weights
Weight of gold is equal to ( dry weight x 1.16 ) minus ( wet weight x 3.07 )
dry weight 50.3 x 1.16 = 58.348
wet weight 10.95 x 3.07 = 33.616
58.348 - 33.616 = 24.732 penny weights of gold
(20 penny weights is one troy ounce)
So Jacks nugget has almost 1 1/4 ounce of gold in it.
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