Glenn in CO Posted February 27, 2017 Share Posted February 27, 2017 Weighs 69 Grams, reads below nickel on Metal Detector, does not stick to a magnet. Thanks for any help! Link to comment Share on other sites More sharing options...
DolanDave Posted February 27, 2017 Share Posted February 27, 2017 Hmmm very interesting, looks like Chondrules popping out of it, but you say it doesn't stick to a magnet...pictures sometimes are hard to determine if it's a meteorite. Can you cut it with a rock saw to see what's inside?? Link to comment Share on other sites More sharing options...
Steve Herschbach Posted February 27, 2017 Share Posted February 27, 2017 Is it not standard procedure to use a grinder to grind a small "window" on a suspected meteorite to get a clear picture of the insides under the crust? I am told that doing so in no way detracts from the value. Any expert comment on that? Link to comment Share on other sites More sharing options...
fredmason Posted February 27, 2017 Share Posted February 27, 2017 I am not an expert, however; It is indeed....one should pick the least attractive portion of the suspect to grind off. A fine/coarse whetstone works very well and will not leave any foreign metallic residue. An area the size of a nickel is quite large enough. I would not grind an iron or pallasite meteorite, if I were certain of what it was...other types of meteorites are beyond the scope of the usual finds. fred 1 Link to comment Share on other sites More sharing options...
fredmason Posted February 27, 2017 Share Posted February 27, 2017 Glen are you using a super magnet? If so tie a string to the magnet and bring the stone close, the attraction may be very weak...almost all meteorites have some magnetic attraction...not all. fred Link to comment Share on other sites More sharing options...
Lunk Posted February 28, 2017 Share Posted February 28, 2017 If your specimen is indeed a meteorite that has chondrules yet is not attracted to a rare earth magnet, it may be a Rumurutiite, or R-chondrite; they are essentially free of elemental nickel-iron alloy. Good luck and congrats on a possible great find. 1 Link to comment Share on other sites More sharing options...
Glenn in CO Posted March 1, 2017 Author Share Posted March 1, 2017 Here are some new pictures and Fred I tried the super magnet and there was no attraction to it. I didn't put the magnet on a string though. Try Steve's "How to Enlarge Photos's" for a better look see. 3 Link to comment Share on other sites More sharing options...
Lunk Posted March 1, 2017 Share Posted March 1, 2017 Those are nice sharp photos that show clear details of the exterior. Lots of terrestrial stones can mimic meteorites on the outside, but the real confirmation is found on the inside; you'll need to file a window to reveal the interior. I like using a dremel tool, as it's much faster than a diamond file. Lets see some chondrules! 1 Link to comment Share on other sites More sharing options...
Glenn in CO Posted March 1, 2017 Author Share Posted March 1, 2017 1 hour ago, Lunk said: Those are nice sharp photos that show clear details of the exterior. Lots of terrestrial stones can mimic meteorites on the outside, but the real confirmation is found on the inside; you'll need to file a window to reveal the interior. I like using a dremel tool, as it's much faster than a diamond file. Lets see some chondrules! How much should I file off? Say a area about the size of a fingernail. Open to any suggestions. Link to comment Share on other sites More sharing options...
Lunk Posted March 1, 2017 Share Posted March 1, 2017 2 minutes ago, Glenn in CO said: How much should I file off? Half an inch square area should be sufficient; just be sure to file deep enough to completely remove the outside surface layer. 1 Link to comment Share on other sites More sharing options...
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