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<p>Hi Rhian- is there any possibility that your fossils have been treated with cyanoacrylate accelerators? These are well know to turn fossils blue/green.</p>
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<p>Amy Davidson</p>
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<div style="DIRECTION: ltr" id="divRpF180239"><font color="#000000" size="2" face="Tahoma"><b>From:</b> nhcoll-l-bounces@mailman.yale.edu [nhcoll-l-bounces@mailman.yale.edu] on behalf of Rhian Russell [rhian.russell@gov.ab.ca]<br>
<b>Sent:</b> Wednesday, October 10, 2012 5:38 PM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu<br>
<b>Subject:</b> [Nhcoll-l] Blue/green discolouration of fossils or stone artifacts<br>
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<p class="MsoNormal">Hello all,</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">We have encountered a phenomenon in our fossil collections where a few specimens have developed a blue/green discolouration, either on the surface of the fossil itself or in the surrounding rock. I’ve just read a paper describing the same
thing happening to flints at the Natural History Museum in Verona (Tapparo et al., 2011, “The mystery of the discoloured flints. New molecules turn prehistoric lithic artifacts blue” in Journal of Analytical and Bioanalytical Chemistry Vol 399 (7) pp.2389
– 2393). </p>
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<p class="MsoNormal">Basically, it seems that volatiles from certain plastics and/or rubbers react to cause the formation of a blue or green stain on the surface of the object and its surrounding matrix.</p>
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<p class="MsoNormal">I’m wondering if anybody has seen this occur in other collections? It requires a very particular set of circumstances so I’m assuming it would be quite rare?</p>
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<p class="MsoNormal">Cheers,</p>
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<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">Rhian Russell</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">Conservation Technician</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">Royal Tyrrell Museum of Palaeontology,</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">Box 7500, Drumheller, Alberta T0J 0Y0</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">Phone: (403) 823 7707 Ext. 3306</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt" lang="EN-CA">E-mail: <a href="mailto:rhian.russell@gov.ab.ca" target="_blank"><span style="COLOR: blue">rhian.russell@gov.ab.ca</span></a></span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt" lang="EN-CA"></span></p>
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