Pete, I don't know if it's been reported in meteorites, but if this was earth material, my first guess would be vivianite, a hydrous iron phosphate. It can look exactly like that (and is often photosensitive: with exposure to sunlight it will darken and often turn dark green).
Maybe someone on the list knows or can check their references regarding vivianite in meteorites. Cheers, Norm (http://tektitesource.com) --- Pete Pete <[EMAIL PROTECTED]> wrote: > > > Hello, all, > > I've mentioned before that my interest in meteorites > is new, and have just > started collecting. > > I've enjoyed buying quantities of (very affordable) > Unclassified NWA's from > some fellow list members, then cutting, polishing, > and spending hours > looking at them through my recently acquired > stereoscope microscope. A whole > new appreciation for chondrules when they're in 3-D! > > Getting to the point; one stone I recently cut, and > polished down to a 400 > grit wet sand cloth, then examined through the > microscope, revealed that one > metallic area (troilite?) has a cavity, and in the > cavity is a very vibrant > purple to navy blue substance. > > http://pskills.onfinite.com/album/185698/628054/ > > http://pskills.onfinite.com/album/185698/628055/ > > The only information I've turned up on the internet > thus far indicates that > sodium chloride in meteorites is purple and blue, > but it's been found just > in the matrix. > > Is it more likely that this substance is some type > of oxide that formed in a > manner similar to a geode? > I can't imagine salt forming or surviving inside a > metallic area like this. > > I have some more close-up pics in hi-res , if > required. > > > Cheers, > Pete > > > ______________________________________________ > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
