[meteorite-list] Question of Iridium in LDG?
Hello All, I bought a small piece of darkish green Libyan Desert Glass from a seller in Tucson. He told me it was dark green from iridium. I had thought the difference in color was from iron. My memory has been really terrible lately so I don't doubt the seller at all. I know this man has forgotten more about meteorites than I will ever know. I think this subject has been covered in the past but can't remember when. Can someone direct me to some links on iridium/iron in LDG so I can learn more? Thanks! Carl2 __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Question of Iridium in LDG?
Hello All, Carl2, you memory serves you right! The color of LDG is affected by: 1) its very high silica content (almost pure silica: 98%). A decreasing silica content correlates with a gradual change of color from yellow over green towards brown. and, ... this has to do with no. 2: 2) the total iron content and by the Fe(II)/Fe(III) ratio. Best wishes, Bernd __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
