October 3-7—JOSHUA TREE, CALIFORNIA: Annual show; Sportsmans Club of Joshua Tree
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 Post subject: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Wed May 23, 2018 5:41 pm 
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Hi.

I'm hoping someone might have a little information on this stone and let me know if the person I picked these up from was correct.

These pieces came from an old collection from the 70's and they recently came to me. I was told that they were Wyoming Jade. But finding information on it has proven itself to be difficult. They are mostly olive green with small black speckles and now and then you can see the pyrite. There are a few that have whiter areas.

If anyone has any ideas or thoughts on this, I would certainly appreciate it.

Thanks!


Attachments:
jade4.jpg
jade4.jpg [ 902.94 KiB | Viewed 1065 times ]
File comment: Not the best picture but it shows the green when the light is behind the stone.
jade3.jpg
jade3.jpg [ 719.86 KiB | Viewed 1065 times ]
jade5.jpg
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File comment: You can see the specks of what I assume is Pyrite on a few of them.
jade1.jpg
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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Thu May 24, 2018 9:36 pm 
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I have collected a fair amount of Wyoming jade, both as a child and more recently. None of it looked like that. that said, I think I have recently seen something similar, if I can just remember where --- I think it was something that Lenny Samuelson was selling.


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sat May 26, 2018 3:24 pm 
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I'm glad to hear from someone who has actually done some collecting. If you can recall at all where you might have seen it, I'd really appreciate it as I'm sitting on over 1000 cabs and it's really important to me that I'm not misleading anyone on the gem type.

Cheers!


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sun May 27, 2018 1:36 pm 
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Why don't you see if someone with a Raman will test a piece for you?


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sun May 27, 2018 3:09 pm 
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I was able to reach out to Lenny who is going to take a few for testing when he can. It'll be interesting to find out anything that can be found out about them.


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sun May 27, 2018 4:52 pm 
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I agree - send it to someone with a Raman and get it identified if you are going to sell it.


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sun May 27, 2018 5:51 pm 
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Oh cool. Lenny lives relatively nearby and comes by semi regularly so we can have a look at them too.


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Sun May 27, 2018 5:54 pm 
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There you go, North V. I see your mystery as promptly solved.


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Tue Jul 10, 2018 11:30 pm 
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I just got a package in the mail today from Lenny containing five green cabochons with flecks of pyrite. At last! He had a look but it didn't ring any bells, aside from not quite looking like any jade he'd seen. My reaction was about the same. The five cabs range from an even light green to a mixture of darker green and white zones, with pyrite cubes mixed in. In microscopic view they show a white or greenish-grey background--rich green zones surround small dark inclusions. It appears to be around hardness 6ish, scratching apatite but not quartz, about even with the feldspar I tried it on.
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So, what is it?
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Based on the raman spectra it appears to be a mixture of quartz and magnesite. It must be pretty silicified to show the hardness it does. I am not sure what is causing the color--maybe some nickel to form gaspeite right around the inclusions? Chromium around chromite (does chromium do anything to magnesite?)
This was definitely not the result I expected, and I'd be very curious if anyone else has run into this kind of material before (or if they have a different idea as to its identity).


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Tue Jul 10, 2018 11:51 pm 
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I have seen similar looking material that was Guatemalan jadeite/omphasite.

Pyrite inclusions were typical in the very dark green Guatemala jadeite called "Galactic Jade".


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 Post subject: Re: Is this Wyoming Jade with flecks of Pyrite
PostPosted: Wed Jul 11, 2018 12:17 am 
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That doesn't surprise me--pyrite shows up in a lot of different contexts. This stuff does have a bit of a jadey look (including some nice roiled texture under the scope), but the spectrum does seem to eliminate both kinds of jade. No pyroxenes or amphiboles are a good match.


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