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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)
27 Mar-05:21:48 Re: the mim museum in beirut, lebanon (Mim Museum)
27 Mar-05:03:26 Re: trying to find information on rose/pink quartz and tourmaline associations. (Ning)
27 Mar-02:39:50 Re: the mim museum in beirut, lebanon (Tobi)
27 Mar-00:23:28 Re: collection of volkmar stingl (Volkmar Stingl)
26 Mar-00:53:41 Re: collection of volkmar stingl (Volkmar Stingl)
25 Mar-13:32:10 Re: collection of michael shaw (Michael Shaw)
25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
23 Mar-13:35:22 Re: collection of firmo espinar (Firmo Espinar)
22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
22 Mar-04:20:41 Re: the mim museum in beirut, lebanon (Mim Museum)
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)
21 Mar-15:34:23 Re: the mizunaka collection - quartz (Am Mizunaka)
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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Quartz, with?
  
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SlowFrog




Joined: 05 Feb 2021
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Location: England

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PostPosted: Feb 09, 2021 20:52    Post subject: Quartz, with?  

Hi! I’m in the UK but my dad was Irish. He brought back lots of quartz rocks from his dad’s birthplace after visiting. I broke up one of the smaller rocks because I was curious about how it might look inside. To my surprise, it had way more variation than I was expecting so I have uploaded some pics to try and find what else is going on within them! I really don’t know much at al about this subject matter but I’d definitely go away and learn more with some information to go on/work with.

Thank you in advance and I hope you find it as interesting as I have!



1F9DE315-19BA-4AAE-AAD0-4E523083DFD0.jpeg
 Mineral: Quartz
 Description:
Donegal
4x3x2cm
One smaller chunk of the original rock.
 Viewed:  3736 Time(s)

1F9DE315-19BA-4AAE-AAD0-4E523083DFD0.jpeg



77ADD2B6-2EF0-4945-A0F8-C7D57665EDEC.jpeg
 Mineral: Quartz
 Description:
Donegal
10x8x5cm approx
 Viewed:  3741 Time(s)

77ADD2B6-2EF0-4945-A0F8-C7D57665EDEC.jpeg



E5177C1E-8D1E-4FA1-8660-D029375A295C.jpeg
 Mineral: Quartz
 Description:
Donegal
 Viewed:  3738 Time(s)

E5177C1E-8D1E-4FA1-8660-D029375A295C.jpeg


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SlowFrog




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PostPosted: Feb 10, 2021 09:03    Post subject: Re: Quartz, with?  

After washing a couple of the above fragments, I noticed some silvery deposits. Any idea what they are?


Deposits.jpg
 Mineral: Quartz
 Description:
Donegal
4cm
 Viewed:  3651 Time(s)

Deposits.jpg


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Pete Richards
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PostPosted: Feb 10, 2021 13:11    Post subject: Re: Quartz, with?  

Most likely the silver granules are pyrite, a form of iron sulfide. The brown stuff is probably a mixture of several iron oxides, which may have resulted at least in part from the weathering of pyrite. Most of the rest appears to just be quartz.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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SlowFrog




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PostPosted: Feb 10, 2021 13:23    Post subject: Re: Quartz, with?  

Thank you, Pete! That's exactly the sort of info I was hoping for.
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