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Jordi Fabre
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Joined: 07 Aug 2006
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Peter Lemkin
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 Posted: Feb 12, 2024 02:42 Post subject: Re: Preparing a list of light sensitive minerals - (14) |
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Thanks. Anyone is welcome to work to combine the various sub-lists into one and annotate where necessary about certain locations or to explain for clarity. Not necessary, but a combined [or two separate] lists of 'light-effected' and 'heat-sensitive' minerals would be helpful - minerals that sometimes need special care in display, storage, etc. I'm not talking about intentional changing of the color of minerals mostly for gemological color.
I guess this could be made into a more complete project of 'minerals with special care needs': light sensitive; heat-sensitive; liable to chemically disintegrate (and methods to stabilize some); minerals that should not be near specific other minerals (or isolated), etc.
If one searches the internet there are some other such lists and if i remember Sinkankas made such a partial list in one of his books [I'd have, but no time to search through just now]. Must be a PhD Thesis out there somewhere on this.....;-)
Absolutely NOT needed, but for me of interest is the WHY/HOW some are sensitive to light; i.e., what mechanism light causes changes in. One must remember that all but surface minerals have spent thousands, millions or billions of years without light. |
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James Catmur
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| Posted: Feb 12, 2024 08:25 Post subject: Re: Preparing a list of light sensitive minerals - (14) |
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| - Barite, La Unión, Murcia, Spain / white -> blue |
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