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11 May-16:20:39 Re: the mizunaka collection (Am Mizunaka)
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05 May-16:13:09 The mizunaka collection - rhodochrosite (Am Mizunaka)
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05 May-12:41:15 Quartz twins (Bob Carnein)
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Removing stubborn minerals from quartz
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Pierre Joubert




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PostPosted: Apr 20, 2017 09:38    Post subject: Re: Removing stubborn minerals from quartz  
GneissWare wrote:
HF (hydrofluoric acid) is orders of magnitude more dangerous than HCl (hydrochoric acid, muriatic acid).


Hi Bob, thank you for reminding me of that. The company has confirmed that there is indeed HF acid in the mixture. I will have to take extra care. What minerals (and from where) do you usually clean?
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GneissWare




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PostPosted: Apr 20, 2017 09:59    Post subject: Re: Removing stubborn minerals from quartz  
I clean anything needing it. I have a full lab with air scribes (3 kinds), air abrasion, acids, etc. I mostly end up using Waller solution (premixed here as Super Iron Out), phosphoric acid and abrasion.
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Pierre Joubert




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PostPosted: Apr 20, 2017 11:26    Post subject: Re: Removing stubborn minerals from quartz  
Sounds very interesting! It is a pity we are so far apart. I would have liked to learn from you.
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