⭐ Gold Detecting Show'n Tell
- Thread starter Goldman
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Nice find ColinD.
And BigWave you're a never ending source of good info. Now I and others now know how to do this. Thanks
And BigWave you're a never ending source of good info. Now I and others now know how to do this. Thanks
My pleasure Din'n-it. Heatho also posted a similar link back in June for determining SG of minerals to aid their identification.
BigWave said:
To determine the SG for gold mixed with quartz is a little different that for a pure mineral. I know it's still similar but there is an extra calculation. I'll see if I can find it or work it out a bit later.
Seems the spreadsheet method is the most accurate. The other way is quite a bit more difficult as the volume needs to be added into the calculation, as such it would be a lot less accurate.
Copied from here:
http://www.gold-prospecting-wa.com/gold-in-quartz.html
Another Simpler Method to Calculate the Weight of Gold In Quartz
This method is also explained on the video at method 2.
What you need is;
A Set of Accurate Scales
A container for water that is big enough to take the rock you are weighing without spilling the contents.
A marker to mark the water container at the different water levels required.
The steps are -
Weigh the rock and record the dry weight.
Partially fill the water container with water and mark the level at the top.
Place the rock specimen in the container.
Mark the new level of the water on the side of the container.
Remove the rock and make sure all the water droplets are returned to the container.
Zero or tare the weight on the scales with the water container on it back to zero.
Fill the container up to the new level and record the weight of the water replaced.
Multiply that weight by the SG of the main matrix of the material. If it is quartz multiply it by the SG of Quartz 2.65.
Take that weight away from the dry weight of the rock and the weight left is a rough estimate of the gold in that specimen.
Remember, this is definitely not as accurate as the first method and both methods are only rough estimates - be cautious with their use.
Copied from here:
http://www.gold-prospecting-wa.com/gold-in-quartz.html
Another Simpler Method to Calculate the Weight of Gold In Quartz
This method is also explained on the video at method 2.
What you need is;
A Set of Accurate Scales
A container for water that is big enough to take the rock you are weighing without spilling the contents.
A marker to mark the water container at the different water levels required.
The steps are -
Weigh the rock and record the dry weight.
Partially fill the water container with water and mark the level at the top.
Place the rock specimen in the container.
Mark the new level of the water on the side of the container.
Remove the rock and make sure all the water droplets are returned to the container.
Zero or tare the weight on the scales with the water container on it back to zero.
Fill the container up to the new level and record the weight of the water replaced.
Multiply that weight by the SG of the main matrix of the material. If it is quartz multiply it by the SG of Quartz 2.65.
Take that weight away from the dry weight of the rock and the weight left is a rough estimate of the gold in that specimen.
Remember, this is definitely not as accurate as the first method and both methods are only rough estimates - be cautious with their use.
Congrats on the finds ColinD and walshie1000....love the nuggets!
Coota
Mick
Here's the result two weeks swinging out there, one at nine grams another just above five and the rest three and under.
Also nabbed a half dozen small specimens that should have a few grams in them.
One large lump of ironstone/Quartz sitting on the surface might go alright, weighs 220g and went of like a bullet. I'll dolly it up and post if it has more than four or five grams in it.
Ya gonna need a bigger scale :lol:
good to see 
Love the specie Coota and well done on the 90g haul! Pity you have to dolly it, but looking forward to the results all the same.
Very nice Coota. What were you swinging?
SteelPat said:BigWave said:Looks like many of us are looking for flatter ground
Maybe its just we are all getting older and cant cope with the hilly ground :|
My knees are knackered from too many years of indoor soccer, but they magically feel great when I get to the goldfields.
PhaseTech said:My knees are knackered from too many years of indoor soccer, but they magically feel great when I get to the goldfields.
I'll second that, works with out fail, Nenad, no doctors/physios required in the goldfields.
G
Guest
Hey Nenad, thats what its like now your getting older. .......good days......bad days
Sorry mate, couldnt help myself
Sorry mate, couldnt help myself
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Got a couple a Heathcote yesterday on the way back from Bendigo
The 2 very little bits broke off the bigger nuggy
And today got my first Nuggy with the Zed
It ended up being 2 nuggys
The smallest was with the SDC
The 2 very little bits broke off the bigger nuggy
And today got my first Nuggy with the Zed
It ended up being 2 nuggys
The smallest was with the SDC
G
Guest
Good start matey
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