[meteorite-list] Re: meteorwrong = hematite ?

From: xrr_at_altern.org <xrr_at_meteoritecentral.com>
Date: Thu Sep 16 13:16:14 2004
Message-ID: <4149CA20.9000401_at_altern.org>

Hi again,

Yes I will probably try to slice it but I still wonder how :) I was planning to
just break it but if there's a doubt I'd prefer not :)

It's true that I forgot to say that it is clearly attracted to magnet and as the
micro picture shows there are (top of the picture) some brigh metalic grains
visible (in the holes zone mainly but not only). I haven't tryed to calculate
the density yet.

Is an hematite never attracted by a magnet ?

Cheers from Stuttgart... (just to mess things up, back in france tomorrow:) )

        Xavier

Zelimir Gabelica wrote:
> Xavier,
>
> Bernd wrote:
>
> Xavier, if *you* want to be 100% sure they are (not) meteoritic,
> why not cut a window or have a window cut into your two stones.
> If there are FeNi patches (nickel-iron) and maybe chondrules or
> other tell-tale features, it would be proof beyond doubt. Just an
> idea from Germany.
> Best wishes,
> Bernd
>
> Bernd is completely right.
> Perhaps a quicker test would be you simply try first with a magnet. A
> hematite (and generally - not always though- a meteorwrong) is not
> attracted.
> As your pictures show stones that resemble ordinary chondrites (quasi
> always attracted), the magnet test will give you a rapid idea/guess.
>
> If you want to make sure the wrong is hematite (and not any other type
> of terrestrial stone), make a simple mark (streak) on a piece of rough
> china (porcelain). Hematite will give a red-brown mark (hence the name
> of the mineral). Most stones yield no mark or often some gray-black one.
>
> Note that some terrestrial minerals like magnetite (of course) do
> attract magnet....
>
> In case of doubt, Bernd's advice is the next to follow
>
> An idea from France
>
> All the best
>
> Zelimir
>
>
>
>
>
> A 18:29 16/09/04 +0200, vous avez ?crit :
>
>> Well, at least it's clear, everybody seems to agree ! :) (for Michael
>> : the four pics are the same rock)
>>
>> a chance I didn't pay much ! and a proof I have a lot to learn ! I
>> have another
>> one that I will show you, but I guess it will be the same then as it
>> was the same vendor... :)
>>
>> So far I didn't want to break it but I guess I will crack it open just
>> to make sure...
>>
>> and to begin to learn, what are the characteristics (on those pictures)
>> identifying with no doubt as an hematite ?
>>
>> Thanks all for your quick answers !
>>
>> Xavier
>>
>> The Earth's Memory wrote:
>>
>>> Hello,
>>> 100% sure: hematite, that is bad luck !
>>> Cheers from France,
>>> Bruno & Carine
>>> La Memoire de la Terre Sarl
>>> The Earth's Memory LLC
>>> France
>>> www.meteorite.fr
>>> www.fossile.fr
>>>
>>> ----- Original Message ----- From: <xrr_at_altern.org>
>>> To: <meteorite-list_at_meteoritecentral.com>
>>> Sent: Wednesday, September 15, 2004 5:56 PM
>>> Subject: [meteorite-list] New - Is this a meteorite ?
>
>
> Prof. Zelimir Gabelica
> Universit? de Haute Alsace
> ENSCMu, Lab. GSEC,
> 3, Rue A. Werner,
> F-68093 Mulhouse Cedex, France
> Tel: +33 (0)3 89 33 68 94
> Fax: +33 (0)3 89 33 68 15
>
>
>
Received on Thu 16 Sep 2004 01:15:12 PM PDT