Dear list members, I received, just today, two Lodranite specimens: an 11.42g end-cut of NWA 4478 and a 9.71g end-cut of NWA 6075. Both specimens are beautiful and the NWA 6075 exhibits an interesting shimmer effect. However, when I looked at the face of the NWA 4478, I was shocked to see what can only be described as a rainbow about 2mm x 3mm (see image in link, will try to get better one up in the next few days).
http://www.meteoritesusa.com/blog/nwa-4478-lodranite-mystery-rainbow-feature / Now the first thing that came to mind is that some oil was trapped in the structure and created the thin-film physical effect (think oil slick). On further inspection, there were no other areas that displayed the same effect though there are similar areas where oil could get trapped. I remembered seeing something similar on the www.meteorites.com.au website in an Al Mahbas specimen, but this looks distinctly different. Oil contaminant or a genuine unusual feature in this lodranite - help me solve the mystery. Thank you and any information provided to help me solve the mystery will be used in any updates to the blog post. Mendy ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
