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27 Mar-19:47:08 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Pete Richards)
27 Mar-16:15:44 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-15:18:59 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Alfredo)
27 Mar-14:39:29 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
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25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
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22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
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21 Mar-22:49:19 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:47:40 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:45:25 Re: green seam. Looks like it in a state of decay. (Ning)
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21 Mar-14:35:08 Re: jim’s mineral collection (Jim Wilkinson)
21 Mar-14:15:36 The 4th phoenix heritage mineral show (phms) hosted by mineralogical society of arizona (m (Chris Whitney-smith)
21 Mar-04:36:10 Re: the mizunaka collection (Tobi)
21 Mar-04:11:47 Re: jim’s mineral collection (James Catmur)
20 Mar-23:34:15 The mizunaka collection - quartz (Am Mizunaka)
20 Mar-18:13:16 Re: jim’s mineral collection (Jim Wilkinson)
20 Mar-14:06:43 Re: dry gill mine, caldbeck fells, cumbria, uk (Forrestblyth)

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Pyrite with bubble-like growths
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Dean Allum




Joined: 27 Jan 2010
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PostPosted: Jan 17, 2021 23:39    Post subject: Re: Pyrite with bubble-like growths  

Pete,
After reading this article, I have another theory for you to consider.

Epitaxial marcasite on pyrite from Rensselaer, Indiana -K. J. Brock; L. D. Slater
American Mineralogist (1978) 63 (1-2): 210–212

During secondary growth, perhaps the temperature/pressure went to a borderline marcasite/pyrite mode and the crystals could not figure out which to follow resulting in amorphous bimodal growth which later psuedomorphed to pyrite.

-Dean
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Roger Warin




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PostPosted: Jan 19, 2021 17:42    Post subject: Re: Pyrite with bubble-like growths  

What becomes of the crystal lattice?
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