Top Trilo Posted December 6, 2020 Share Posted December 6, 2020 Ive seen pyritized plueroceras ammonites that look golden, like this one, but there is also this one that is the same species from same location with same pyrite but not as shiny, is the difference just one is polished and one is not? Thanks for the help 1 “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
Ludwigia Posted December 6, 2020 Share Posted December 6, 2020 It wouldn't surprise me if the one on the left was given a good scrub with a brass brush. 3 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Notidanodon Posted December 21, 2020 Share Posted December 21, 2020 @Ludwigia is right, it’s common practice to polish these with brass wire brushes on rotary devices, in fact, I think there’s a video on YouTube somewhere if you look I saw it a while ago 3 Link to comment Share on other sites More sharing options...
LabRatKing Posted December 21, 2020 Share Posted December 21, 2020 I’d bet the “pyretized” one has been covered with burnished metal foil like gold leaf. It is suspiciously uniform. 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 21, 2020 Share Posted December 21, 2020 1 minute ago, LabRatKing said: I’d bet the “pyretized” one has been covered with burnished metal foil like gold leaf. It is suspiciously uniform. Brass brush does the same. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
LabRatKing Posted December 21, 2020 Share Posted December 21, 2020 Just now, Fossildude19 said: Brass brush does the same. Yeah. Just seems to bright to me. 1 Link to comment Share on other sites More sharing options...
Kosmoceras Posted December 21, 2020 Share Posted December 21, 2020 I believe the one on the left has been polished with a wire brush to achieve that finish. The one on the right is "as found" but it is poorly preserved in comparison with pyrite overgrowth on the specimen, so it will never make a great display piece. 1 Link to comment Share on other sites More sharing options...
Bob Saunders Posted December 21, 2020 Share Posted December 21, 2020 pyrite is iron sulfide. The sulfur is used for things like farm fertilizer. welding flux and car battery acid. often 60% mix. It looks to uniform and how long will the brass coating stay bright on iron? Today lots of fertilizer is made from the sulfur removed from crude oil. 1 Link to comment Share on other sites More sharing options...
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