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Minelab Eureka gold tips, settings, questions
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<blockquote data-quote="bob" data-source="post: 335218" data-attributes="member: 628"><p>Just an update on the specimen finds from 22nd May. I put the specimens in Ali Brite for a day but they showed little change. Day two the visible gold looked brighter but the other rock was unchanged. This was not what I expected. By day three there appeared to be no change. I lost patience and fished them out and washed them thoroughly. The acid had softened the rock somewhat and I used the pliers to crush away the stone. The gold structures were very delicate and broke easily just picking them up. The brown iron stone like material was interesting. It was like a conglomerate containing small grains of quartz, some larger bits of quartz that had small specks of gold, plus inclusions of gold cemented together by a brown glue. Most interesting. The separated gold weighed in at 1 gram. I did manage to recover some sizeable bits that are very prickly and still have small grains of quartz attached.<img src="https://www.prospectingaustralia.com/forum/img/member-images/628/1496146534_22nd_may_crushing_1g..jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Maybe I will try leaving them longer if I find some more. Having never done the acid treatment before I did not know what to expect.</p><p></p><p>cheers Bob.</p></blockquote><p></p>
[QUOTE="bob, post: 335218, member: 628"] Just an update on the specimen finds from 22nd May. I put the specimens in Ali Brite for a day but they showed little change. Day two the visible gold looked brighter but the other rock was unchanged. This was not what I expected. By day three there appeared to be no change. I lost patience and fished them out and washed them thoroughly. The acid had softened the rock somewhat and I used the pliers to crush away the stone. The gold structures were very delicate and broke easily just picking them up. The brown iron stone like material was interesting. It was like a conglomerate containing small grains of quartz, some larger bits of quartz that had small specks of gold, plus inclusions of gold cemented together by a brown glue. Most interesting. The separated gold weighed in at 1 gram. I did manage to recover some sizeable bits that are very prickly and still have small grains of quartz attached.[img]https://www.prospectingaustralia.com/forum/img/member-images/628/1496146534_22nd_may_crushing_1g..jpg[/img] Maybe I will try leaving them longer if I find some more. Having never done the acid treatment before I did not know what to expect. cheers Bob. [/QUOTE]
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Metal Detectors
Minelab
Minelab Eureka gold tips, settings, questions
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