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Ru Smith
Joined: 13 Oct 2012
Posts: 362
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Posted: Jul 02, 2013 21:59 Post subject: How many different habits of chalcocite twins are there? |
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This one is quite unusual.
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Chalcocite. Dzhezkazgan Mine, Dzhezkazkan, Karagandy Province, Kazakhstan. 12 mm twin on 3 cm matrix. |
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11731 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Jul 02, 2013 23:49 Post subject: Re: How many different habits of chalcocite twins are there? |
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You are correct. This mine produces very strange chalcocite crystals. Here is another example (no closeups but same basic form).
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Chalcocite Dzhezkazgan Mine, Dzhezkazgan, Qaraghandy Oblysy, Kazakhstan 151 x 113 x 64 mm up to 16 mm Chalcocite crystals |
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11696 Time(s) |
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Ru Smith
Joined: 13 Oct 2012
Posts: 362
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Posted: Jul 27, 2013 12:43 Post subject: Re: How many different habits of chalcocite twins are there? |
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Impressive specimen, GneissWare. Here's a more conventional tabular pseudohexagonal twin.
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Chalcocite twin. Dzhezkazgan Mine, Dzhezkazkag, Karagandy Province, Kazakhstan. 8 mm twin. |
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11456 Time(s) |
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Chalcocite twin. Dzhezkazgan Mine, Dzhezkazkag, Karagandy Province, Kazakhstan. 8 mm twin. |
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11485 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Jul 27, 2013 16:08 Post subject: Re: How many different habits of chalcocite twins are there? |
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It still looks a bit blocky compared to other localities. Nice crystal.
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Ru Smith
Joined: 13 Oct 2012
Posts: 362
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Posted: Aug 10, 2013 11:24 Post subject: Re: How many different habits of chalcocite twins are there? |
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A Cornish example.
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Chalcocite. Geevor Mine, Cornwall, England, UK. 18 mm specimen. |
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11221 Time(s) |
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Ru Smith
Joined: 13 Oct 2012
Posts: 362
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Posted: Aug 25, 2013 21:38 Post subject: Re: How many different habits of chalcocite twins are there? |
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just another little Cornish specimen.
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Chalcocite twins. Redruth, Cornwall, England, UK. 11 mm. |
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11001 Time(s) |
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