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Brochantite

 
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Geopressure



Joined: 26 Mar 2017
Posts: 65
Location: Nashville, TN

PostPosted: Wed Jun 26, 2019 12:12 pm    Post subject: Brochantite Reply with quote

Brochantite with Malachite on an unknown white mineral

Stacked at 6.75X
Conventional diffused lighting
FOV 2.7mm

Interestingly, the bluish white mineral appears to have formed casts or coating over some earlier tabular mineral..from the shape one might suspect Wulfenite.


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jurkovicovic



Joined: 16 Jul 2017
Posts: 33

PostPosted: Thu Jun 27, 2019 2:54 am    Post subject: Reply with quote

Great shot Very Happy I like that it looks natural.
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Harald



Joined: 13 May 2011
Posts: 581
Location: Steinberg, Norway

PostPosted: Thu Jun 27, 2019 2:06 pm    Post subject: Reply with quote

Hi Geopressure,
Great image with very good light.
Those Brochantite can be a challenge

Thanks for sharing Very Happy
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Harald

Lier Fotoklubb / NSFF
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Geopressure



Joined: 26 Mar 2017
Posts: 65
Location: Nashville, TN

PostPosted: Thu Jun 27, 2019 2:16 pm    Post subject: Reply with quote

Thanks guys! To me they could almost be tourmaline Very Happy
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JW



Joined: 23 Feb 2011
Posts: 152
Location: New Haven, CT, USA

PostPosted: Fri Jun 28, 2019 10:19 am    Post subject: Reply with quote

GeoP - what is the locality. The bluish-white could be either chalcedony or allophane over wulfenite or barite, or something else.

Very nice well balanced image, by the way!
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Geopressure



Joined: 26 Mar 2017
Posts: 65
Location: Nashville, TN

PostPosted: Fri Jun 28, 2019 11:11 am    Post subject: Reply with quote

I had not considered Allophane..but the coating appears fibrous, though at the edge of resolution.

Unfortunately I don't know the locality. It is from a mostly unlabeled collection Sad
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soldevilla



Joined: 16 Dec 2010
Posts: 551
Location: Barcelona, more or less

PostPosted: Sat Jun 29, 2019 11:38 am    Post subject: Reply with quote

Great shot!
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Smokedaddy



Joined: 07 Oct 2006
Posts: 1476
Location: Phoenix, Arizona

PostPosted: Sat Jun 29, 2019 11:24 pm    Post subject: Reply with quote

Excellent image, could it be white botryoidal calcite?
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Geopressure



Joined: 26 Mar 2017
Posts: 65
Location: Nashville, TN

PostPosted: Mon Jul 01, 2019 7:21 pm    Post subject: Reply with quote

It could be calcite..but currently I'm leaning toward Hemimorphite, as someone suggested on a different post.
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JL



Joined: 02 Feb 2014
Posts: 148
Location: Houston, Tx

PostPosted: Tue Jul 02, 2019 6:06 am    Post subject: Reply with quote

Beautiful sample and incredibly crisp photo Shocked
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