Need some advice

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Need some advice

Post by madmav on Thu 18 Dec 2014, 9:38 pm

Need some advice from the more experienced than me,,,,
Have a specci with a quantity of Quartz, looking like very crystalline gold contained, have had it in Ali brite for approx 24hrs and the small amount of ironstone has now gone,,,,
So how can I dissolve the Quartz without damaging the gold structure ???
Help please
Happy hunting
Steve, Lea and Buddy
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Re: Need some advice

Post by Bignuggs on Thu 18 Dec 2014, 9:55 pm

take a pic and show us what's happenin.

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Re: Need some advice

Post by Jon on Thu 18 Dec 2014, 10:31 pm

Hi Steve
Leave it in the Alibrite for about 2 weeks it has a small amount of hydrofluric acid in it, and thats the only stuff that will dissolve the quartz.

Cheers Jon

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Re: Need some advice

Post by Guest on Fri 19 Dec 2014, 3:59 am

As John said just leave it in the Alibrite for a couple of weeks, you can do it quicker with a stronger solution of Hydrofluric but the stuff is very dangerous and best left alone.

The other thing is you say the gold in the specimen looks crystalline ?, if the structure is solid looking then you might end up with a nice piece but if the structure of the gold is broken up and more like speckled through the quartz then you will end up with just the individual grains of gold left after the quartz is disolved.

If you can put up a good pic of it then we can get a better idea of what you are working with, I have seen more than a few specimens wrecked by acid, some are best left alone.

au-fever

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Re: Need some advice

Post by madmav on Fri 19 Dec 2014, 6:49 am

Will post a pic later today, this appears to more of a solid lump inside going by the weight, looks more encased but you will see by the pic later,,, 77.6g in fact
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Steve, Lea and Buddy


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Re: Need some advice

Post by martinjsto on Fri 19 Dec 2014, 12:49 pm

I thinks it will be a long time in acid to remove all the rock. I have 2 species in HCL now for 2 weeks and it has only done about half of the quartz and its only a 7 gram specie smaller than a 5c piece. give it enough time and replace the acid regularly and you will eventually see the gold but i would probably just smash it.

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Re: Need some advice

Post by mulgadansa on Fri 19 Dec 2014, 1:01 pm

Get the dolly pot out Mav

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Re: Need some advice

Post by toad on Sat 20 Dec 2014, 8:11 am

Change the acid every 4 to 5 days with fresh stuff.
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Re: Need some advice

Post by thedigger on Sat 20 Dec 2014, 9:44 am

Use heat and shatter the stone,and you will need heat it well.

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Re: Need some advice

Post by thedigger on Sat 20 Dec 2014, 9:48 am

And forgot then drop in water

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Re: Need some advice

Post by Nightjar on Sat 20 Dec 2014, 3:14 pm

Use of a multi meter is handy to determine whether the interlaced gold is joined together throughout the specie.



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Re: Need some advice

Post by madmav on Sat 20 Dec 2014, 5:08 pm

All great ideas keep em coming guys, thanks heaps
Happy hunting
Steve, Lea and Buddy
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