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Gold Prospecting
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Acid to dissolve quartz ?
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<blockquote data-quote="mbasko" data-source="post: 283965" data-attributes="member: 4485"><p>Some previous discussion here:</p><p><a href="https://www.prospectingaustralia.com/forum/viewtopic.php?id=1692" target="_blank">https://www.prospectingaustralia.com/forum/viewtopic.php?id=1692</a></p><p>From anything I have seen hydrofluoric acid is the only acid that will dissolve quartz. </p><p>I've had some speccis where the quartz will become chalky & start breaking down quickly in Alibrite - even after a few days or so. Others seem to remain intact even after weeks in the Alibrite? Alibrite being a very low percentage of HF seems to only be effective mostly for cleaning or starting to break it down. It would take months to dissolve even the "chalky" bits I've had.</p><p>If you want to break it down or dissolve it entirely you'd need a stronger HF concentrate acid solution but IMO it's too dangerous for home use. If your sure the gold is joined maybe contact a lab? I've crushed etc. a fair few speccis & found that very few had the gold joined internally even though a lot show gold on various or all sides.</p><p>I've never tried the thermal shock method mentioned in the thread above but it might be worth a try.</p></blockquote><p></p>
[QUOTE="mbasko, post: 283965, member: 4485"] Some previous discussion here: [url]https://www.prospectingaustralia.com/forum/viewtopic.php?id=1692[/url] From anything I have seen hydrofluoric acid is the only acid that will dissolve quartz. I've had some speccis where the quartz will become chalky & start breaking down quickly in Alibrite - even after a few days or so. Others seem to remain intact even after weeks in the Alibrite? Alibrite being a very low percentage of HF seems to only be effective mostly for cleaning or starting to break it down. It would take months to dissolve even the "chalky" bits I've had. If you want to break it down or dissolve it entirely you'd need a stronger HF concentrate acid solution but IMO it's too dangerous for home use. If your sure the gold is joined maybe contact a lab? I've crushed etc. a fair few speccis & found that very few had the gold joined internally even though a lot show gold on various or all sides. I've never tried the thermal shock method mentioned in the thread above but it might be worth a try. [/QUOTE]
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Gold Prospecting
Prospecting Equipment
Acid to dissolve quartz ?
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