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Green botryoidal formation
  
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Marjolein van Braak




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PostPosted: Aug 28, 2021 06:47    Post subject: Green botryoidal formation  

I am not sure about this one. It could be malachite? The light green feels soft to the touch, but if you've touched it, the thin layer seems damaged. I don't know where it comes from.


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James Catmur
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PostPosted: Aug 28, 2021 06:51    Post subject: Re: Green botryoidal formation  

Please do some tests = streak and hardness, then we can help you
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Marjolein van Braak




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PostPosted: Aug 28, 2021 07:34    Post subject: Re: Green botryoidal formation  

The hardness is around 3.The streak color is light green.
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James Catmur
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PostPosted: Aug 28, 2021 09:23    Post subject: Re: Green botryoidal formation  

Try this search tool, it may help you

https://www.mindat.org/advanced_search.php

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Bob Morgan




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PostPosted: Aug 28, 2021 09:49    Post subject: Re: Green botryoidal formation  

What is the black mineral on your specimen? On mindat there are a couple of photo's of malachite with botryoidal hematite.
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Kevin Schofield




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PostPosted: Aug 28, 2021 10:45    Post subject: Re: Green botryoidal formation  

Marjolein van Braak wrote:
I am not sure about this one. It could be malachite? The light green feels soft to the touch, but if you've touched it, the thin layer seems damaged. I don't know where it comes from.


Hi Marjolein,

looks like malachite with chrysocolla, most likely provenance is the Democratic Republic of Congo

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Marjolein van Braak




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PostPosted: Aug 28, 2021 11:58    Post subject: Re: Green botryoidal formation  

Bob Morgan wrote:
What is the black mineral on your specimen? On mindat there are a couple of photo's of malachite with botryoidal hematite.


If you mean the 'black' botryoidal formation in the middle. This is actually dark green (more obvious when you shine light on it) and I think this is most likely to be malachite.
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