[meteorite-list] What's with these weird Campos?

[Meteorites USA]

Yeah,  I wonder if anyone's ever etched a Campo crystal before?

Eric


On 1/19/2011 6:48 PM, Michael Gilmer wrote:
> Hi Bob,
>
> AFAIK, these are made by taking a low-grade ruster or "dog" and
> freezing it in liquid nitrogen.  Then frozen meteorite is then
> shattered and it fragments along the crystal-plane boundaries of the
> taenite and kamacite - the result is these "crystals" with a polished
> appearance.
>
> This process works best with coarse octahedrites of lower value like
> Campo and Nantan.
>
> Some people like them, some people don't.  I think they are a neat way
> to "upcycle" a lower grade piece into something more marketable, but
> they are also a bit misleading because newbies may tend to think iron
> meteorites naturally look that way.
>
> Best regards,
>
> MikeG
>
> ----------------------------------------------------------------------
> Mike Gilmer - Galactic Stone&  Ironworks Meteorites
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>
> On 1/19/11, Bob King<nightsky55 at gmail.com>  wrote:
>    
>> Hi everyone,
>> This has been bugging me a while, but I've noticed lots of smaller
>> Campo del Cielos on eBay recently that look like very melted
>> Sikhote-Alins. Does anyone know what's going on with these? Is someone
>> blowing up Campos and melting down the pieces. Here's an example:
>> http://tinyurl.com/4nuvhwn
>> Thanks!
>> Bob
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