Free silica is at most an accessory component in known meteorites. If the whole rock has a high cristobalite peak, it is likely a terrestrial rock. Possibilities include sandstone, quartzite and various silicaceous igneous rocks.
On Fri, May 21, 2021 at 4:05 PM yasmani.ceballo--- via Meteorite-list <[email protected]> wrote: > > Hello friends > I have a surviving difractogram of a rock that was thinked to be > meteorite in the past, but now is lost. > The only information we have is the presence of these minerals: > cristobalite, quartz, olivine, enstatite, plagioclase and amorphous > materials. Probably super high peaks of cristobalite, followed by > quartz. > This is the only information we have, so I know is nothing, but with > that how we can say? > I mean, a high cristobalite peak mean anything? There is no > cristobalite in the geology of the area where the rock is believed to > have fallen. > Thanks > > > > > ______________________________________________ > > EXTREMELY RARE MARTIAN AND LUNAR MAIN MASS METEORITES > https://www.bonhams.com/auctions/27190/ > Coming to auction in Bonhams Meteorites Online sale. Browse 90+ lots of > superb planetary meteorite specimens & impact memorabilia, including rare > main mass Martian and Lunar meteorites. > > Bid online May 18-28 at Bonhams : Meteorites Online > https://www.bonhams.com/auctions/27190/ > ______________________________________________ > > Meteorite-list mailing list > [email protected] > https://pairlist2.pair.net/mailman/listinfo/meteorite-list -- Alan Rubin Institute of Geophysics and Planetary Physics Department of Earth, Planetary, and Space Sciences University of California 3845 Slichter Hall 603 Charles Young Dr. E Los Angeles, CA 90095-1567 USA office phone: 310-825-3202 fax: 310-206-3051 e-mail: [email protected] website: http://cosmochemists.igpp.ucla.edu/Rubin.html ______________________________________________ EXTREMELY RARE MARTIAN AND LUNAR MAIN MASS METEORITES https://www.bonhams.com/auctions/27190/ Coming to auction in Bonhams Meteorites Online sale. Browse 90+ lots of superb planetary meteorite specimens & impact memorabilia, including rare main mass Martian and Lunar meteorites. Bid online May 18-28 at Bonhams : Meteorites Online https://www.bonhams.com/auctions/27190/ ______________________________________________ Meteorite-list mailing list [email protected] https://pairlist2.pair.net/mailman/listinfo/meteorite-list
