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Iridescent pyrite
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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Joseph DOliveira




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PostPosted: Nov 04, 2018 20:57    Post subject: Iridescent pyrite  

I recently acquired a few small specimens of red iridescent pyrite with no location information. The crystals are modified cubes with curved faces and have a thin oxide coating giving it a red/green iridescence. The crystals are partially covered with a secondary growth of small <5mm clear calcite, micro pyrite and dark green platy mica crystals.

It is possible that the specimens came from the Idaho area but that is just an assumption based on other material I received. Any help is appreciated.

Joe



P1014900 (2).JPG
 Mineral: Pyrite
 Description:
Unknown
4.5x3.5x2.5 cm
 Viewed:  667 Time(s)

P1014900 (2).JPG



P1014896 (2).JPG
 Mineral: Pyrite
 Description:
Unknown
5x2.5x2.5 cm
 Viewed:  660 Time(s)

P1014896 (2).JPG



P1014897 (2).JPG
 Mineral: Pyrite
 Description:
Unknown
5x4.5x3 cm
 Viewed:  661 Time(s)

P1014897 (2).JPG



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Joseph D'Oliveira
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Jeff




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PostPosted: Nov 04, 2018 23:18    Post subject: Re: iridescent pyrite  

If this specimen is, in fact, from Idaho, it appears to me similar to those from a number of the mines in the Idaho Silver Belt (Kellogg-Wallace-Burke, etc.). Without being able to do more than look at the photos, I would guess that it may be arsenopyrite associated with pyrite. Arsenopyrite often has an iridescence similar to what appears on the specimen.
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Joseph DOliveira




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PostPosted: Nov 04, 2018 23:25    Post subject: Re: iridescent pyrite  

Thanks Jeff, I will use just a general location for the specimens.
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Joseph D'Oliveira
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PostPosted: Nov 05, 2018 00:05    Post subject: Re: iridescent pyrite  

I like Pyrite - very nice mineral with lots of shapes
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