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Gemstones, Minerals & Fossils
Gemstones and Minerals
Help with cleaning quartz crystals
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<blockquote data-quote="gudachi" data-source="post: 48659" data-attributes="member: 1405"><p>Hi adam ive cleaned up lots of quartz crystals with the same iron oxide coating and yes oxalic will do the trick but isnt great to breathe any of the fumes and takes a while to do, I have found hydrochloric acid from hardware much more effctive break it down 50/50 with water and leave soak in a plastic not metal container(also use a mask and rubber gloves) it will strip away iron oxide pretty well mild staining check after a few hours for heavy staining leave overnight it wont hurt the crystal at all, but if you want to keep away from chemicals go the wire brush bench grinder or drill setup that will clean off most of it and cant hurt crystals either quartz is harder than wire but it will leave a grey metal coating on them but easy to clean off later,Also if your doing clusters with too strong an acid or too long with small gaps and crevices the hydrochloric can seep in too deep in and cause a yellowing stain which time out in the hot sun will help remove single points come up a treat....good luck</p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/1405/1389046019_yellowing_in_cluster.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/1405/1389046036_ashton_quartz.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="gudachi, post: 48659, member: 1405"] Hi adam ive cleaned up lots of quartz crystals with the same iron oxide coating and yes oxalic will do the trick but isnt great to breathe any of the fumes and takes a while to do, I have found hydrochloric acid from hardware much more effctive break it down 50/50 with water and leave soak in a plastic not metal container(also use a mask and rubber gloves) it will strip away iron oxide pretty well mild staining check after a few hours for heavy staining leave overnight it wont hurt the crystal at all, but if you want to keep away from chemicals go the wire brush bench grinder or drill setup that will clean off most of it and cant hurt crystals either quartz is harder than wire but it will leave a grey metal coating on them but easy to clean off later,Also if your doing clusters with too strong an acid or too long with small gaps and crevices the hydrochloric can seep in too deep in and cause a yellowing stain which time out in the hot sun will help remove single points come up a treat....good luck [img]https://www.prospectingaustralia.com/forum/img/member-images/1405/1389046019_yellowing_in_cluster.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/1405/1389046036_ashton_quartz.jpg[/img] [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Help with cleaning quartz crystals
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