Jp’s Gold Thread

[Gold Catcher]

3 Results. How we know who is right? 🙂

[Jonathan Porter]

1 minute ago, Gold Catcher said:

3 Results. How we know who is right? 🙂

Dolly pot and an oxy torch. 😇🤣

[Gold Catcher]

🤑I hope the right answer is yours

[mn90403]

I used this online gold calculator.  It does allow you to take into consideration a lot of different host rock/quartz if you know its specific gravity.

I 'played' with the formula years ago when I found a couple of nice specimen and there is a margin of error for quartz.  I also found a specimen with my 800 a couple of years ago that had very little gold.  I had to be very, very careful in my weight measurements in order to get a 'reasonable' estimate as I'm not going to dolly it up.

It is also possible to come pretty close by weighing my specimen and weighing a similar size piece of local quartz.  The difference in weight between those two in dry air give you the weight of gold.

http://www.desert-gold-diggers.org/gold/specgrav.htm#:~:text=Specific Gravity Formulas,all in some other unit.&text=Wg %3D Wsa * A,sw * A * B).

[Gold Catcher]

18 minutes ago, davsgold said:

I use this XLS spreadsheet to get an idea of gold content, you can change some of the parameters.

 

Thanks. I think the question is whether you can use the density of quartz all the time, as in the spread sheet. I suspect that if the host rock is not quartz, then the formula might not be accurate. The formula I used determines the specific gravity of the specimen  regardless of what the host rock is. Let's see how much JP gets at the end 🙂

[Jonathan Porter]

1 hour ago, davsgold said:

I use this XLS spreadsheet to get an idea of gold content, you can change some of the parameters.

 

Gold specie calculator.xls 46 kB · 7 downloads

So what did you come up with using your calculator Dave?

[Lunk]

JP, can you give us what you think is the average purity of the gold in your area?

[Jonathan Porter]

1 hour ago, Lunk said:

JP, can you give us what you think is the average purity of the gold in your area?

96% to 97% pure

[Lunk]

24 minutes ago, Jonathan Porter said:

96% to 97% pure

In that case, using a purity of 96.5%, my estimate is 68.1 grams of gold. I believe the formula that you are using assumes a purity of 85%.

[Jonathan Porter]

2 minutes ago, Lunk said:

In that case, using a purity of 96.5%, my estimate is 68.1 grams of gold. I believe the formula that you are using assumes a purity of 85%.

Interesting 🤔