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Identity HelpWhat makes blue colors?
6th Nov 2016 01:58 UTCSophiaJoy MB
What causes the light blue in Blue Lace Agate?
I've been looking for information about causes of colors in minerals...
Thanks for your help!
6th Nov 2016 07:23 UTCJoel Dyer
There are several reasons for colours in minerals / gemstones. Mains reasons include:
- Certain elements in the mineral's / gem's chemical composition (in the case of some minerals)
- Defects in the crystal structure of the mineral
- Inclusions of foreign material in the mineral
- Damage in the crystal structure caused for example by natural radiation
- Trace elements - for instance "transition" elements or "REE" elements
- Other scattering / refraction of light inside the mineral, several reasons here
Here are some links:
http://www.webexhibits.org/causesofcolor/6.html
http://www.compoundchem.com/2014/06/29/what-causes-the-colour-of-gemstones/
http://nature.berkeley.edu/classes/eps2//wisc/Lect7.html
http://www.gia.edu/gems-gemology/fall-1987-color-gems-fritsch
Cheers,
6th Nov 2016 18:06 UTCElise Skalwold
Skalwold, E.A. and W.A. Bassett. (2016) Blue minerals: exploring cause & effect. Rocks & Minerals, Vol.91, No.1, pages 61-75. The whole issue is great and can be ordered through the link, or you can obtain the article through your library.
Very best wishes,
Elise
SophiaJoy MB Wrote:
-------------------------------------------------------
> What causes the blue in blue Calcite?
> What causes the light blue in Blue Lace Agate?
>
> I've been looking for information about causes of
> colors in minerals...
>
> Thanks for your help!
7th Nov 2016 01:25 UTCSophiaJoy MB
Regarding Blue Calcite, some say the blue color is caused by strontium. Is it right?
I thought strontium was not safe to touch...
7th Nov 2016 01:51 UTCReiner Mielke Expert
7th Nov 2016 02:29 UTCDoug Daniels
8th Nov 2016 14:25 UTCSophiaJoy MB
OK, so, Blue Calcite doesn't have strontium...(tu)
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