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SlowFrog
Joined: 05 Feb 2021
Posts: 5
Location: England
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Posted: Feb 09, 2021 20:52 Post subject: Quartz, with? |
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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!
Mineral: | Quartz |
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Donegal 4x3x2cm One smaller chunk of the original rock. |
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3945 Time(s) |
![1F9DE315-19BA-4AAE-AAD0-4E523083DFD0.jpeg](files/thumbs/t_1f9de315_19ba_4aae_aad0_4e523083dfd0_210.jpeg)
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Mineral: | Quartz |
Description: |
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3946 Time(s) |
![77ADD2B6-2EF0-4945-A0F8-C7D57665EDEC.jpeg](files/thumbs/t_77add2b6_2ef0_4945_a0f8_c7d57665edec_133.jpeg)
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Mineral: | Quartz |
Description: |
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3948 Time(s) |
![E5177C1E-8D1E-4FA1-8660-D029375A295C.jpeg](files/thumbs/t_e5177c1e_8d1e_4fa1_8660_d029375a295c_182.jpeg)
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SlowFrog
Joined: 05 Feb 2021
Posts: 5
Location: England
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Posted: Feb 10, 2021 09:03 Post subject: Re: Quartz, with? |
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After washing a couple of the above fragments, I noticed some silvery deposits. Any idea what they are?
Mineral: | Quartz |
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3857 Time(s) |
![Deposits.jpg](files/thumbs/t_deposits_124.jpg)
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Pete Richards
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Joined: 29 Dec 2008
Posts: 830
Location: Northeast Ohio
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Posted: Feb 10, 2021 13:11 Post subject: Re: Quartz, with? |
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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.
_________________ Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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SlowFrog
Joined: 05 Feb 2021
Posts: 5
Location: England
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Posted: Feb 10, 2021 13:23 Post subject: Re: Quartz, with? |
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Thank you, Pete! That's exactly the sort of info I was hoping for.
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