Gold Catcher Posted December 28, 2020 Share Posted December 28, 2020 3 Results. How we know who is right? 🙂 Link to comment Share on other sites More sharing options...
Jonathan Porter Posted December 28, 2020 Author Share Posted December 28, 2020 1 minute ago, Gold Catcher said: 3 Results. How we know who is right? 🙂 Dolly pot and an oxy torch. 😇🤣 Link to comment Share on other sites More sharing options...
Gold Catcher Posted December 28, 2020 Share Posted December 28, 2020 🤑I hope the right answer is yours Link to comment Share on other sites More sharing options...
mn90403 Posted December 29, 2020 Share Posted December 29, 2020 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). Link to comment Share on other sites More sharing options...
Gold Catcher Posted December 29, 2020 Share Posted December 29, 2020 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 🙂 Link to comment Share on other sites More sharing options...
Jonathan Porter Posted December 29, 2020 Author Share Posted December 29, 2020 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? Link to comment Share on other sites More sharing options...
Lunk Posted December 29, 2020 Share Posted December 29, 2020 JP, can you give us what you think is the average purity of the gold in your area? Link to comment Share on other sites More sharing options...
Jonathan Porter Posted December 29, 2020 Author Share Posted December 29, 2020 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 Link to comment Share on other sites More sharing options...
Lunk Posted December 29, 2020 Share Posted December 29, 2020 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%. Link to comment Share on other sites More sharing options...
Jonathan Porter Posted December 29, 2020 Author Share Posted December 29, 2020 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 🤔 Link to comment Share on other sites More sharing options...
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