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Marjolein van Braak
Joined: 28 Aug 2021
Posts: 10
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 Posted: Aug 28, 2021 06:47 Post subject: Green botryoidal formation |
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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
Site Admin
Joined: 14 Sep 2006
Posts: 1351
Location: Cambridge
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| Posted: Aug 28, 2021 06:51 Post subject: Re: Green botryoidal formation |
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| Please do some tests = streak and hardness, then we can help you
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Marjolein van Braak
Joined: 28 Aug 2021
Posts: 10
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| Posted: Aug 28, 2021 07:34 Post subject: Re: Green botryoidal formation |
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| The hardness is around 3.The streak color is light green.
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James Catmur
Site Admin
Joined: 14 Sep 2006
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Location: Cambridge
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Bob Morgan
Joined: 18 Jan 2018
Posts: 229
Location: Savannah, Georgia
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| Posted: Aug 28, 2021 09:49 Post subject: Re: Green botryoidal formation |
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| 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
Joined: 05 Jan 2018
Posts: 163
Location: Beacon NY
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| Posted: Aug 28, 2021 10:45 Post subject: Re: Green botryoidal formation |
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| 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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Veni, Vidi, Emi |
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Marjolein van Braak
Joined: 28 Aug 2021
Posts: 10
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| Posted: Aug 28, 2021 11:58 Post subject: Re: Green botryoidal formation |
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| 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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