Rob & list, The last post clarifies the question a bit. A few years ago I received a large shipment of Lei gong mo. Included with these were a couple of dozen specimens with strong carnival-glass-like patinas, a full rainbow of submetallic colors. I have seen weaker examples of this sort of patina on old bottles that have been through fires. My guess was that the tektites may have been through a warehouse fire or some such thing. Clearly there is some process that will cause tektites to develop carnival-glass type films, and I don't think it is a natural process or we would see this more often. While not exactly a change in the glass color, this can yield a profound change in appearance. I would be interested to hear if anyone knows anything about the manufacture of carnival glass.
Cheers, Norm Lehrman (http://tektitesource.com) --- "Matson, Robert" <[EMAIL PROTECTED]> wrote: > Thanks, everyone, for their inputs on the effects of > heating tektites. > My reason for posing the question was that a friend > told me about a > mineral dealer (in Ventura County, CA, I believe) > who was selling > heat-treated tektites in a variety of unusual > colors. I told my > friend that it sounded suspicious to me, but that I > wasn't a tektite > expert and would ask "The List". Consensus here > seems to be that > the process of heating up a tektite to white hot and > then letting > it cool back down produces no major color > alterations. However, > I need to get back to the friend to find out if > these unusual > colors were transparent or opaque. If the latter, I > suppose it's > possible that someone could simply "paint" a tektite > (though I > question the motives for doing so). But I can't > think of a process > where you would get, say, a red or blue transparent > tektite using > a moldavite as your starting point. > > Thanks, > Rob > > ______________________________________________ > Meteorite-list mailing list > [EMAIL PROTECTED] > http://www.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
