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Zunyite from Canada
  
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Roger Warin




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PostPosted: Nov 28, 2022 15:37    Post subject: Zunyite from Canada  

Zunyite from the Francis Coune collection.
with chalcopyrite?
locality:: Silverstone Canada.
Do you know?



Zunyite_Canada#3-A-c_R.jpg
 Mineral: Zunyite
 Locality:
Canada
 Description:
with chalcopyrite ?
 Viewed:  1241 Time(s)

Zunyite_Canada#3-A-c_R.jpg


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Bob Carnein




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PostPosted: Nov 28, 2022 18:17    Post subject: Re: Zunyite from Canada  

I wonder whether this might be sphalerite? Try the hardness--zunyite is very hard (7).
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alfredo
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PostPosted: Nov 28, 2022 18:38    Post subject: Re: Zunyite from Canada  

I too suspect sphalerite.
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David K. Joyce




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PostPosted: Nov 28, 2022 22:00    Post subject: Re: Zunyite from Canada  

The whole thing is suspect. I have never heard of a Silverstone locality. I don't know ALL of the localities, though. Zunyite is not listed in the "Catalogue of Canadian Minerals". The association certainly does look like it could be sphalerite.
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Roger Warin




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PostPosted: Nov 30, 2022 05:05    Post subject: Re: Zunyite from Canada  

Hello,

Thank you very much for your relevant opinions.
Moreover, are there aluminous rocks in Canada whose alteration could have given zunyite?
Roger.
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David K. Joyce




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PostPosted: Nov 30, 2022 10:55    Post subject: Re: Zunyite from Canada  

Yes, of course there are aluminous rocks in Canada. What is more important is the location. Are there the right conditions present at this locality to result in zunyite. The "Silverstone" locality is a mystery so we cannot look up any geological/mine/exploration data about it. There is a Silverton, British Columbia, which was a well known and well studied silver mining area.https://www.mindat.org/loc-209672.html Zunyite has not been reported from there.
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alfredo
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PostPosted: Nov 30, 2022 12:54    Post subject: Re: Zunyite from Canada  

As David points out, "Silverstone" is likely an error for Silverton, and Silverton has plenty of sphalerite and chalcopyrite, which this specimen appears to be. It does not look to me like zunyite, and the only zunyite I know in association with sulphides is in "roseki"-type deposits, which are hydrothermal acid alteration halos around volcanic rocks, consisting largely of pyrophyllite and sericite. I'm not personally familiar with Silverton but I doubt that is the case there, is it? My opinion would be that you have a completely screwed up label and no zunyite, but I'd be happy to be proven wrong.
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