[Nhcoll-l] Kunzite Display

Wed Oct 14 15:07:48 EDT 2015

*         RE: Monitor the color of the specimen carefully and reduce exposure before a 'just noticeable fade' is realized. Measuring the color of a transparent stone is far from easy and depends on what equipment you have available. We could discuss off line.

I'd be interested in following this conversation (if it goes offline)!

Thanks so much,
Deborah

From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Robert Waller
Sent: Wednesday, October 14, 2015 3:51 PM
To: 'Zusin, Cortney' <Cortney.Zusin at Tiffany.com>; nhcoll-l at mailman.yale.edu
Subject: Re: [Nhcoll-l] Kunzite Display

Hi Cortney,
Just as there is variability in the colors of kunzites there is variability in their light-fading sensitivity. Those two variabilities arise for similar reasons - differences in energy gaps between various electron 'traps' (see Nassau 1992 In: F. Howie (ed.) Care and Conservation of Geological Material: Minerals, Meteorites and Lunar Finds. Butterworth Heinemann, London, 1992).

Knowing the locality and collection date could lead to less uncertainty in predicting light fading rate for your specimen - if you can draw on specific experience from another collection - but it will not lead to certainty.

So what can we say?

*         It would be prudent to ensure there is no UV (even though it is not certain that this would reduce fading it is the sensible precautionary thing to do).

*         Have the specimen illuminated by visitors activating the specimen light only while viewing. This is probably the most effective and cost-effective conservation measure.

*         It would be sensible to not have higher light levels than necessary for viewers to appreciate the specimen.

*         Monitor the color of the specimen carefully and reduce exposure before a 'just noticeable fade' is realized. Measuring the color of a transparent stone is far from easy and depends on what equipment you have available. We could discuss off line.
Best,
Rob

Robert Waller, PhD, CAPC, FIIC
President and Senior Risk Analyst
Protect Heritage Corp.
622 Simoneau Way
Ottawa  ON  K4A 1P4
email: rw at protectheritage.com<mailto:rw at protectheritage.com>
internet: www.protectheritage.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.protectheritage.com_&d=AwMFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=5P1k5N5Q1c69VA8PFMH1qZIZZ8zSCv1KcavsgT1zgLk&s=dfF-O40QHe4JmzR4ktZJKUQS82UsWppBdlQDc9ZZDDQ&e=>
phone: 613-883-2707 (Canada)
phone: 303-872-9739 (USA)
skype: rrwaller
and, Research Associate, Canadian Museum of Nature
and, Adjunct Assistant Professor, Queen's University
     [cid:image001.png at 01D1069A.775E8B30]    [https://urldefense.proofpoint.com/v2/url?u=http-3A__nature.ca_images_logo-5Fe.jpg&d=AwIFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=vFpmga4XdK0hd605nGakEb8FJE6J2ONvauP0PzbTQdo&s=fEESPu4ZL7JwLp_5iS0pY0mdW6Qj3_XUNUc2rKmouFU&e= ]    [Description: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.queensu.ca_writingcentre_images_QueensLogo.png&d=AwIFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=vFpmga4XdK0hd605nGakEb8FJE6J2ONvauP0PzbTQdo&s=DpTSmbCESsHOyCeUpgPLkPd7ti0TGo_xkLR1cSU5ffY&e= ]

                [cid:image004.png at 01D1069A.775E8B30] <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.facebook.com_ProtectHeritageCorp-3Fref-3Dtn-5Ftnmn&d=AwMFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=5P1k5N5Q1c69VA8PFMH1qZIZZ8zSCv1KcavsgT1zgLk&s=tAhZ-hWZpTwY3VM7LilPwFjayD_BX1fV7uWUtxI4Zls&e=>           [cid:image005.png at 01D1069A.775E8B30] <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_-23-21_ProtectHeritage&d=AwMFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=5P1k5N5Q1c69VA8PFMH1qZIZZ8zSCv1KcavsgT1zgLk&s=aU1w0o7eYK8DCZTFetAkEzKBW9t7y9W_yJr35ChbPzY&e=>

From: nhcoll-l-bounces at mailman.yale.edu<mailto:nhcoll-l-bounces at mailman.yale.edu> [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Zusin, Cortney
Sent: October 9, 2015 12:10 PM
To: 'nhcoll-l at mailman.yale.edu' <nhcoll-l at mailman.yale.edu<mailto:nhcoll-l at mailman.yale.edu>>
Subject: [Nhcoll-l] Kunzite Display

Hello all,

I've had a request to loan a piece of early, very bright pink kunzite for a museum exhibition.  Our chief gemologist has been unable to find any concrete information for how quickly kunzite fades and under what light and temperature conditions.  Would anyone be able to share guidelines for displaying kunzite to prevent fading?

Thank you!
Best,
Cortney

Cortney Zusin
Archives Registrar
Tiffany & Co.
15 Sylvan Way
Parsippany, NJ 07054
T: 973-254-7206
F: 973-254-7205
Cortney.Zusin at tiffany.com<mailto:Cortney.Zusin at tiffany.com>

The information contained in this email message may be privileged,
confidential, and protected from disclosure. Any unauthorized use,
printing, copying,disclosure, dissemination of or reliance upon
this communication by persons other than the intended recipient
may be subject to legal restriction or sanction. If you think that
you have received this E-mail message in error, please reply to
the sender and delete this email promptly.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 2489 bytes
Desc: image001.png
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 1830 bytes
Desc: image002.jpg
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment.jpg 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.png
Type: image/png
Size: 2376 bytes
Desc: image003.png
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment-0001.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.png
Type: image/png
Size: 5624 bytes
Desc: image004.png
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment-0002.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image005.png
Type: image/png
Size: 4545 bytes
Desc: image005.png
Url : http://mailman.yale.edu/pipermail/nhcoll-l/attachments/20151014/f0e9dbef/attachment-0003.png 