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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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11649 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).
| Description: |
Chalcocite
Dzhezkazgan Mine, Dzhezkazgan, Qaraghandy Oblysy, Kazakhstan
151 x 113 x 64 mm
up to 16 mm Chalcocite crystals |
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11619 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.
| Description: |
Chalcocite twin.
Dzhezkazgan Mine, Dzhezkazkag, Karagandy Province, Kazakhstan.
8 mm twin. |
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11377 Time(s) |
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| Description: |
Chalcocite twin.
Dzhezkazgan Mine, Dzhezkazkag, Karagandy Province, Kazakhstan.
8 mm twin. |
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11406 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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11142 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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10921 Time(s) |
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