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 Post subject: What gemstones are affected by sunlight?
PostPosted: Tue Feb 09, 2010 1:27 pm 
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OK All - it's another one of Squeaky's wierd questions... :roll:

What gemstones are affected by direct or indirect sunlight other than the color change stones that are SUPPOSED to change?

* Spodumenes fade (Kunzite/Hiddenite) - Is this both direct AND indirect sun?

* Tourmaline - there's a tourmaline that changes color....Ms Barb, I forgot what it's called. :oops:

* 'Andesine' fade.... :twisted: ....heehee....

* Emeralds - I ASSUME direct sunlight it would dry out oil but I don't know for sure...??


See...I TOLD you it was another strange Squeaky question....

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 Post subject:
PostPosted: Tue Feb 09, 2010 1:47 pm 
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unheated yellow sapphire can fade.

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 Post subject:
PostPosted: Tue Feb 09, 2010 3:31 pm 
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Some Topaz will lose it's color, just like the sherry-colored material from Utah.

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 Post subject:
PostPosted: Tue Feb 09, 2010 3:46 pm 
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TheGemDr wrote:
unheated yellow sapphire can fade.
Tony.


Stonebender wrote:
Some Topaz will lose it's color, just like the sherry-colored material from Utah.


Thanks Tony/Ryan - is it direct or indirect sunlight that causes these to fade? ...guess anything affected by 'indirect' would have the same results with 'direct' wouldn't it... :?

I'm trying to figure out the types of stones to avoid when I know one of my pieces will possibly be near a window or direct sunlight...there are some I'll probably avoid completely just because they're so affected by everyday light exposure. My backs are always completely dry and sealed with UV protection sealers so those are no problem.

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 Post subject:
PostPosted: Tue Feb 09, 2010 5:13 pm 
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Maxixe Acqua....

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 Post subject:
PostPosted: Tue Feb 09, 2010 5:21 pm 
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some of the quartz family of gems-amethyst, smoky quartz :cry:


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 Post subject:
PostPosted: Tue Feb 09, 2010 5:31 pm 
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What's going to happen with the Amethyst? Will it fade completely? If Amethyst is a problem then is Citrine?

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 Post subject:
PostPosted: Tue Feb 09, 2010 6:51 pm 
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Citrine can fade in sunlight, as well as rose quartz. :?

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 Post subject:
PostPosted: Tue Feb 09, 2010 6:59 pm 
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There is tenebrescent zircons as well, although a temporary phenomenon it may fit the list.

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 Post subject:
PostPosted: Tue Feb 09, 2010 7:12 pm 
May as well throw in Prasiolite with citrine/ammy.

Did I imagine once reading about Morganites sometimes fading? I tend to get Kunzite and Morganite things mixed up, so maybe. It does ring a bell though....

Also, dunno if we are only doing facet materials here, but they always say to leave Chrysoprase away from sunlight too.


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 Post subject:
PostPosted: Tue Feb 09, 2010 7:35 pm 
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i think kunzite will fade, not sure about material from afghanistan that's a beautiful purplish pink color, nor if morganite will fade either.


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 Post subject:
PostPosted: Tue Feb 09, 2010 9:31 pm 
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Kyriakin wrote:
....Also, dunno if we are only doing facet materials here, but they always say to leave Chrysoprase away from sunlight too.


No I'm not restricted to any specific material. What will happen with Chrysoprase? I have some beautiful antique jewelry pieces with chrysoprase in them but I don't even have them unpacked.

eta: TIM! THANK YOU! That's it! Tenebrescent zircons, not tourmalines. :oops: :oops:

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 Post subject:
PostPosted: Sat Feb 13, 2010 8:02 pm 
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Coral comes to my mind, can completely go white...


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 Post subject:
PostPosted: Sat Feb 13, 2010 8:19 pm 
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hiddenite (green spodumene)


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 Post subject:
PostPosted: Sat Feb 13, 2010 8:49 pm 
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It is my understanding that true Hiddenite does not fade and that is what differentiates it from irradiated spodumene.

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