[meteorite-list] I have found "life" in my CO3

[STARSANDSCOPES at aol.com]

I have some big unclassified NWA that I have  nicknamed UBS or Ugly Black 
Stuff and it was growing similar looking white thin  crystals as well but only in 
certain parts (Patches)

I am guessing  moisture accelerates it.

Tom

In a message dated 11/1/2008 6:43:10  P.M. Mountain Daylight Time, 
axelsson at acc.umu.se writes:
Could it be  gypsum?

Oxidation of sulphides -> sulphuric acid, reacts with CAI and  silicates 
-> CaSO4 = gypsum.

I have had a number of  weathered  sulphide ore samples which have 
developed white patches on  the surface after I have washed them. I don't 
know if it is gypsum on my  specimens but I have always suspected it.

Thanks for  sharing!

/Göran

Marcin Cimala - PolandMET wrote:
> Hello  List
>
> Tooday I wanted to make some description for my new  meteorites. When I 
> opened one of the boxes, something white almost eat  me :)
>
> OK now seriously
> Here is my new MC058 CO3.x  chondrite. I received it on end of august, 
> cut several slices and store  it in cardboard box like all other 
> meteorites that wait for  clasification. Tooday I wanted to make photos 
> and I have found large  white crystals growing on both sides of two 
> slices.
> Wow,  something fantastic.
>
> I remember I have similar things on my  Ogrueil, but this one is much 
> more larger. Anyone know what it is  ?
>
> I will leave them in box for next two months and lets wait if  this 
> will still grown. But now there will maybe be too cold for them.  
> Anyway I will try to hold them undamaged even for next  year.
>
> Have fun
>  http://www.polandmet.com/_mc058.htm
>
> PS.
> I have for sale  three large complete specimens of new CV3, 
> unclassified but propably  paired with one of the lates CV's. TKW = 
> 1154g. Attractive low price.  Specimens will be classified. For more 
> info please email  me.
>
> -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
>  http://www.Meteoryty.pl              marcin(at)meteoryty.pl
>  http://www.PolandMET.com        marcin(at)meteorite.pl
>  http://www.Gao-Guenie.com      GSM: +48 (793)  kosmos
> --------[ Member of Polish Meteoritical Society  ]--------
>
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