0
   

Can somebody help identify if these are meteoric

 
 
Reply Tue 25 Apr, 2017 10:31 am
My cousin came to me with these two rocks asking me to help identify what he and his friend has found, we are in Yemen I have no clue about rocks , they tried to clean one with acid it has kind metal look with small golden pieces both rocks are small but pretty heavy for their size
The smaller one weighs 256.85 grams the one they tried to clean the shiny one 240.5 grams. Both smaller then a fist
Someone convinced them it's something valuable, another one the put in oven with 1500 and it turned like metal looks, so can anyone help pictures links here https://ibb.co/groVwQ
https://ibb.co/gzJkVk
https://ibb.co/eiZEO5
https://ibb.co/nbZsAk
https://ibb.co/mzkM35
https://ibb.co/hJ9EO5
https://ibb.co/cfBTi5
https://ibb.co/nG0cbQ
https://ibb.co/kFr5Vk
 
rosborne979
 
  1  
Reply Tue 25 Apr, 2017 03:22 pm
@Kareem ,
What makes you think they are meteorites? What characteristics do they have which you suspect match those of meteorites?


timur
 
  3  
Reply Tue 25 Apr, 2017 03:50 pm
I don't think they are meteorites.

The first one is almost certainly fuchsite (chromium mica) and the second one seems to be chromite...
farmerman
 
  3  
Reply Tue 25 Apr, 2017 04:32 pm
@timur,
I dont think its fuchsite which is a very low grade metamorphic mica common to "greenschist facies" its a green slimey slightly expansive mica that turns to clay when exposed to .
The only way to tell if these are meteories is to get em examined or do a cross section, polish the cross section and do an acid etch to draw out the angular "widmenstaaten figures".
Its really hard to tell from photos like these. They do have reaction surfaces from their incoming ride but they also could be, as you said ferrochrome which is a brittle product of the first stages of chrome production. They take the chromite ore and hit it within an arc furnace and the result is a dark surfaced brittle granular product. They then break it into chunks about that size and further react to make either metal ingots, pigments or sponge (much like Ti).

Im leaning toward the ferrochrome guess.
Kareem
 
  1  
Reply Wed 26 Apr, 2017 03:38 pm
@rosborne979,
Coz they found them in a desert area , and they are very heavy,they don't attract magnets and there are flakes of golden color inside
Kareem
 
  1  
Reply Wed 26 Apr, 2017 03:40 pm
@timur,
They're all the same just one of them heated and turned out to be like that
farmerman
 
  1  
Reply Wed 26 Apr, 2017 03:41 pm
@Kareem ,
most metallic meteorites doattract mgnts very trongly. pallisites and other chondrites . not so much but those hve other disagnotics
Kareem
 
  1  
Reply Wed 26 Apr, 2017 03:46 pm
@farmerman,
Is fuchsite or ferrochrome found in desert area that has no rock formations just like that?

I don't think so , but again I am not an expert in these issues, that's why I am trying to find out what are these.
0 Replies
 
Kareem
 
  1  
Reply Wed 26 Apr, 2017 03:51 pm
@farmerman,
But Korotev Randy told me the opposite , he said if they attract magnets then they are not meteor
farmerman
 
  1  
Reply Wed 26 Apr, 2017 03:59 pm
@Kareem ,
no he didnt. Dont try to BS a BS'r.
Id go back to him again
farmerman
 
  1  
Reply Wed 26 Apr, 2017 04:33 pm
@farmerman,
Heres what Korotev really says

METEORITES ARE USUALLY ATTRACTED BY MAGNETS
0 Replies
 
timur
 
  1  
Reply Wed 26 Apr, 2017 04:57 pm
@Kareem ,
Kareem wrote:

They're all the same just one of them heated and turned out to be like that

If they were meteorites, they would hardly change their color with heat, having already endured the extreme temperatures of an atmosphere entry.
farmerman
 
  1  
Reply Wed 26 Apr, 2017 05:37 pm
@timur,
I like your chrome idea more and more
0 Replies
 
Kareem
 
  1  
Reply Fri 28 Apr, 2017 12:54 pm
@farmerman,
Oh yes he did I still have the email if u don't believe me, he said if they don't attract the cheap refrigerator magnets they are meteor ! I am not the kind that Bs anyone,,
farmerman
 
  1  
Reply Fri 28 Apr, 2017 03:34 pm
@Kareem ,
you apparently did NOT read the clip that I posted above. It is written by Randy Korotev and as he said

"Meteorites are NOT magnets, but a magnet attracts it due to the Fe Ni content"
0 Replies
 
 

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