Specific Gravity On Specimen

[fourtyniner]

Are the any mathematicians out there who can work this out for me? This specimen I found last week has a dry weight of 14.44 grams. And has a wet weight of 12.80 grams. How much gold is in it? It's very heavy for it's size, so I think it's mostly gold, Cheers.

[mn90403]

https://www.pjlcreative.au/gold-calculator.html

11.7 g if you weighed it properly!  Congratulations.

[Jim in Idaho]

Roughly 11.52 grams or .370oz...or $1703...lol   Nice find!

Jim

[Jim in Idaho]

LOL...Mn beat me to it.

Jim

[mn90403]

We got different numbers.  Maybe you use a different sg for quartz?

[Gold Junkie]

Nice one for sure! 

[Jim in Idaho]

11 hours ago, mn90403 said:

We got different numbers.  Maybe you use a different sg for quartz?

Nah...could be anything. I was using a chart, and estimating between numbers...could have been off a hair, Didn't figure it mattered all that much...LOL

Jim

[Bedrock Bob]

It is what it is... a nice nugget. Whatever it weighs minus the quartz multiplied by the spot price today is exactly not quite as much as it should be worth.

Beat it flat and weigh it again. It's easier than doing the math and probably how it will wind up anyway. 

 

...I'd call it a 20 gram nugget when I was talking to anyone without a scale. 

 

[mn90403]

Years ago when I was finding a few specimens there was a club claim site that allowed for 'adjustment' of the quartz value.  Let's face it, some quartz is heavier than others or vice versa.  

That site was taken down and over the years many calculations have been presented here using pen and paper and 'old style' calculations.  Those can be just as accurate of an estimate as the online calculator was.  The link I posted is a calculator that replaces the old one.  I didn't have a chance to look at the details when I found and posted it but now see it is as adjustable as the old one.

Yesterday I had the pleasure of seeing Pieter Heydelaar again.  It had been several years since I had seen him at the Tucson Gem and Mineral Show.  He reminded me that he had weighed a specimen I found while looking for meteorites.  I had estimated with the old formula that there was 1.5 ozt in it.  He had 'professionally' confirmed it for me.

Later when I found another specimen that was larger I estimated the gold in it by finding a similar sized piece of quartz without any gold.  The difference between the two weights was the gold weight!  It is not as accurate as the SG test but gives a rough estimate but I wouldn't sell or buy a nugget based upon that alone.

As Bob says and as many others on the forum say ... dolly it up and then you will get the real answer.  If you find someone who can cab that specimen and make a ring for you from some other gold you have found then you may be able to get 3X the value of the gold alone.