Amount of gold in specimen formula

[Relichunter2016 498]

Just wanted to share this simple procedure to get an approx. gold weight in a gold/quartz specimen. Took it off Bill & Linda's site. If your not familiar with their site , its pretty cool , lots of pictures and interesting things on it. Iam going to try this procedure today with a large speci I found 3 years ago out in Randsburg, ca. Not sure how accurate it is, but even if it's off by a few grams on larger specimens it's better than not knowing at all what you have in the specimen. 

 

http://www.billandlindaprospecting.com/sgtest.html

[LipCa 315]

With the info(dry weight and wet weight), get a little closer by using the rest of the formula and take into account the weight of the quartz:

http://www.gold-nuggets.org/specific-gravity-test.htm

[Relichunter2016 498]

Thanks LipCa,

 

I will give both formulas a try and see the difference between them, will post results later.

 

Ok so my dry weight is 156 penny weight, wet weight 48 pennyweight.

It comes to  around 1.67 troy ounce of gold within specimen.

I tried the other formula and screwed up. I will give it a go again and see how close it come out to the 1.67 grams.  Okay so Second formula at 1.58 troy ounces....pretty close.  I thought I had more gold in the specimen, for a 5 ounce gold / quartz piece I thought i would have around 2-3 ouncesbut I am still thrilled I have 1.6 ounces of gold 

Edited January 20, 2017 by Relichunter2016

[LipCa 315]

The next one will have more gold!

[Relichunter2016 498]

Thanks LipCa

Just have to go back to this location, it's been 3 years !! Now I just have to go through 5 more gold/quartz specimens I found over the years....But the most important thing is...the formula is no mystery to me anymore.....easy..peasie....You never stop learning....Thanks again.

[Relichunter2016 498]

ok specific gravity test ....

Specimen weight 30.95 grams

 

dry weight in pennyweight is 19.8 dwt

wet weight us 7 dwt

what is the weight of gold in specimen ? Those that get it correct get a pat on the shoulder....

[Relichunter2016 498]

You folks just  no  fun anymore......maths tough, but Geeezzz....

[LipCa 315]

So, what is the host rock so we may use the SG of that rock?

Specimen weight and dry weight should be the same....  30.95 grams does not equal 19.8 dwt

not enough info...

[Relichunter2016 498]

19.8 Pennyweights x 1.55 = 30.69 grams dry weight . Wet weight 7 Pennyweights x 1.55 =  10. 85 grams

 

The matrix is quartz... 

 

There are a few formulas but I used a simple one...not sure of its accuracy but I came up with a number. Thought it would be a cool thing to post, goal being to make it less a mystery than it is. The formula I used is on billandlindaprospecting.com How many of us have random specimens laying around and just toss it in a safe place  without knowing the gold content? I bet a few.

 

Edited March 24, 2017 by Relichunter2016

[LipCa 315]

http://www.billandlindaprospecting.com/sgtest.html formula does not take host rock into account.