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Post by Drummond Island Rocks on Nov 28, 2014 21:31:20 GMT -5
I hope this picture shows what I am seeing but I have seen plenty of pyrite while cabbing but this just looks really yellow and metallic. Any thoughts on weather it would be pyrite or gold in this material from Vancouver B.C. ? maybe bcrockhound knows? Chuck
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,553
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Post by jamesp on Nov 28, 2014 21:50:09 GMT -5
Washingtonrocks mentioned gold in some of those Vancouver area rocks.
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spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Nov 28, 2014 21:57:34 GMT -5
Do you have any nitric acid. A drop should tell you.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Nov 28, 2014 22:16:32 GMT -5
Do you have any nitric acid. A drop should tell you. Please elaborate.
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spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
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Post by spiritstone on Nov 28, 2014 22:26:01 GMT -5
Do you have any nitric acid. A drop should tell you. Please elaborate. I'm thinking as in a gold test kit also hydrochloric acid, more steps involved and maybe the gold might be to small?
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bcrockhound
spending too much on rocks
Member since June 2014
Posts: 418
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Post by bcrockhound on Nov 28, 2014 22:26:03 GMT -5
I do not know but am interested. There is gold in the area/on the island but only rarely do I notice metal inclusions in Dallasite. I've read about people panning the beaches here for gold so I wouldn't be surprised if the odd speck found its way into some rocks.
On another makeup note, I've been talking to an old guy in this area who thinks the web definition of Dallasite might be wrong (epidote, quartz, altered basalt, pumpelleyite), and that epidote might not be an integral part and instead it's pumpelleyite that causes the colours. I think he might be onto something as some pieces, and especially seen in the epidote in quartz here, have a stringy green substance going through them that looks like the epdiote in Unakite but does not resemble the green/coloured areas of Dallasite. For anyone with experience with epidote, I'd like to hear what you think about that.
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southforkmining
spending too much on rocks
Member since October 2006
Posts: 275
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Post by southforkmining on Nov 28, 2014 23:19:02 GMT -5
Another metal that I find, in Northern California, and can look like either gold or pyrite is native copper.....just keep that in mind..in most cases for pyrite you can usally see some type of cubic or rectangular look...
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Post by jakesrocks on Nov 28, 2014 23:35:53 GMT -5
Look at it under magnification, and try scratching it with a pin or needle. Gold will scratch. Pyrite won't.
I doubt that it would be copper which would have a reddish copper color.
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Post by gingerkid on Nov 29, 2014 6:15:54 GMT -5
I cheated and googled 'dallasite.' From wikipedia, "Dallasite is a breccia made of quartz, epidote, altered basalt and pumpellyite." I wonder if the shiny material may be pumpellyite after looking at pics of the mineral, which kinda look like pyrite suns in the wiki photo, except that is a greenish-color? Photo source: wikipedia Pumpellyite (Fe++) from Slovakia edited to add: oops, my apologies, bcrockhound, didn't see your previous post about pumpellyite. Interesting that your friend thinks it may be the epidote that causes the color in dallasite.
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Post by Drummond Island Rocks on Nov 29, 2014 9:27:52 GMT -5
Thanks for all the input I already boxed this one up to send it back to bcrockhound so maybe after he gets it he can let us know his opinion on it. I have seen plenty of native copper in rocks and I would say its not that. It is a nice bright yellow in color. Chuck
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