They're actually pretty stable, I've had some in a drawer for 2 years and they're still shiny metallic.
If you'd like them to tarnish you can leave them outside for a few months. -YvW On Wed, Jan 19, 2011 at 9:18 PM, Bob King <[email protected]> wrote: > Thanks everyone for all your replies. OK, so they appear to be blown > up Campos. If true, they must have looked a lot more like shrapnel > with sharp edges. It makes sense then, as Bob C. reported, that > they're tumbled. If water's used in the tumbling process, I'm guessing > these things will rust up quickly. > Bob > > On Wed, Jan 19, 2011 at 9:04 PM, Meteorites USA <[email protected]> > wrote: >> Yeah, I wonder if anyone's ever etched a Campo crystal before? >> >> Eric >> >> >> On 1/19/2011 6:48 PM, Michael Gilmer wrote: >>> >>> Hi Bob, >>> >>> AFAIK, these are made by taking a low-grade ruster or "dog" and >>> freezing it in liquid nitrogen. Then frozen meteorite is then >>> shattered and it fragments along the crystal-plane boundaries of the >>> taenite and kamacite - the result is these "crystals" with a polished >>> appearance. >>> >>> This process works best with coarse octahedrites of lower value like >>> Campo and Nantan. >>> >>> Some people like them, some people don't. I think they are a neat way >>> to "upcycle" a lower grade piece into something more marketable, but >>> they are also a bit misleading because newbies may tend to think iron >>> meteorites naturally look that way. >>> >>> Best regards, >>> >>> MikeG >>> >>> ---------------------------------------------------------------------- >>> Mike Gilmer - Galactic Stone& Ironworks Meteorites >>> >>> Website - http://www.galactic-stone.com >>> Facebook - http://www.facebook.com/galacticstone >>> News Feed - http://www.galactic-stone.com/rss/126516 >>> Twitter - http://twitter.com/galacticstone >>> Meteorite Top List - http://meteorite.gotop100.com >>> EOM - http://www.encyclopedia-of-meteorites.com/collection.aspx?id=1564 >>> ----------------------------------------------------------------------- >>> >>> On 1/19/11, Bob King<[email protected]> wrote: >>> >>>> >>>> Hi everyone, >>>> This has been bugging me a while, but I've noticed lots of smaller >>>> Campo del Cielos on eBay recently that look like very melted >>>> Sikhote-Alins. Does anyone know what's going on with these? Is someone >>>> blowing up Campos and melting down the pieces. Here's an example: >>>> http://tinyurl.com/4nuvhwn >>>> Thanks! >>>> Bob >>>> ______________________________________________ >>>> 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 >>>> >>>> >>> >>> ______________________________________________ >>> 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 >>> >>> >> >> ______________________________________________ >> 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 >> > ______________________________________________ > 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 > ______________________________________________ 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
