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Colorado Prospector - Gem and mineral prospecting and mining forums _ Gem and Mineral Specimen Finds or Processes _ what do i have here ?
Posted by: dbx Mar 18 2022, 09:50 AM
see attached . . .
Long time lurker ... occasional panner. But found this pretty rock.
Wonder what all the colors mean.
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Posted by: johnnybravo300 Mar 18 2022, 07:38 PM
Hard to tell but looks similar to oxidized copper.
Posted by: Denise Mar 19 2022, 09:42 AM
Cool rock! Very hard to tell by just the picture but looks a bit like Zeolites to me the way the white crystals fan out. 
![confused0082[1].gif](http://www.coloradoprospector.com/forums/style_emoticons/default/confused0082[1].gif)
Nice find!
Posted by: NewRockHounder Apr 1 2022, 12:00 PM
Looks like some kinda copper related mineral to me.
Or perhaps (after looking closer at the first pic) really decayed pyrite.
Posted by: Goldshark Sep 2 2022, 12:08 AM
Looks to be partially oxidized Chalcopyrite. It could also be some Magnetite. The early smelters would use course Magnetite, FeO. as a flux in sulphide ores. It adsorbs the sulphur from the pyrite, leaving the Gold behind to get collected by the Lead. The smelting process leaves the Magnetite looking like a mass of sulphide . If you get a good tone from a decent Gold detector, it is probably Magnetite. You can also get a good detector tone from a pyritic Gold sample, if the Gold is 3-5 ounces minimum, per ton, is what I am finding out. Easy test, a magnet will attract to Magnetite, not to sulfides though.
Posted by: Goldshark Sep 6 2022, 07:26 PM
It also looks like a typical ore specimen from the Silverton, Colo. area.
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