I've got a large Ghubara slice that was done by a Norwegian dealer (I think maybe by Lars?), absolutely stunning, mirror finish, and actually one of my best slices, looks an unearthly 'spooky black'! And I'd recommend a mirror finish on a Ghubara any day! As for rustiness - Mines stayed mint, Actually I have found that mirror polished slices keep better than rough ones (though sometimes rough ones do show chondrules better..)
Best Mark -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 03 May 2007 14:14 To: [email protected] Subject: Re: [meteorite-list] Polishing Chondrite Slices Hi, This is Tom Phillips, the microscope guy, which really means the polishing guy. I have to agree, Ghubara is both tough to polish with out scratches and when I revisited some polished slices I had made a year ago, all were good except the Ghubara. It had to be repolished before any scope time. Perhaps some one can suggest a sealing method that would work for your sphere? Tom In a message dated 5/3/2007 4:27:37 A.M. Mountain Daylight Time, [EMAIL PROTECTED] writes: I just bought a Ghubaro and plan to have part of it made into a sphere, >obviously ;), and the rest will be cut into slices > > I would like to polish the slices and was wondering if anyone has any > experience doing this. > > I have a variety of belt sanders and palm sanders but I don't know what > kind of abrasive to use, is there a specific type for polishing "stone > like" material? Be carefull, becouse primo, ghubara is hard and every scratch from grinding will be visible on polished slice. secundo, Ghubara is one of the best ruster I have seen in chondrites. ************************************** See what's free at http://www.aol.com. ______________________________________________ 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
