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Gold Prospecting
Prospecting Equipment
Acid to dissolve quartz ?
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<blockquote data-quote="BigWave" data-source="post: 267045" data-attributes="member: 6786"><p>I use HF (Ali Brite) to clean nuggets coated in ironstone and brings out the gold colour. I use the appropriate safety gear. The plastic container to use is PET plastic such as plastic coke bottles for low concentration HF. I leave the top on lightly to minimise fumes (outside obviously). Nitrile gloves - not latex. Arm and face protection. Finally a tube of Calgonate (Calcium Gluconate) on hand as a just-in-case, just-in-case. Bicarbsoda to neutralise thoroughly when done. Here are two nuggets that were totally encased in ironstone, with very little gold showing through. The crystalline structure inside looks brilliant under high magnification.</p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/6786/1470714505_etched_gold.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="BigWave, post: 267045, member: 6786"] I use HF (Ali Brite) to clean nuggets coated in ironstone and brings out the gold colour. I use the appropriate safety gear. The plastic container to use is PET plastic such as plastic coke bottles for low concentration HF. I leave the top on lightly to minimise fumes (outside obviously). Nitrile gloves - not latex. Arm and face protection. Finally a tube of Calgonate (Calcium Gluconate) on hand as a just-in-case, just-in-case. Bicarbsoda to neutralise thoroughly when done. Here are two nuggets that were totally encased in ironstone, with very little gold showing through. The crystalline structure inside looks brilliant under high magnification. [img]https://www.prospectingaustralia.com/forum/img/member-images/6786/1470714505_etched_gold.jpg[/img] [/QUOTE]
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Gold Prospecting
Prospecting Equipment
Acid to dissolve quartz ?
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