[meteorite-list] AD: Special: NWA 5243 - a thought about a fine L3

[Zelimir.Gabelica at uha.fr]

Hi Martin,

Can you save for me the 7.190 g slice (until Ensisheim) ?

Thanks!

Zelimir




Martin Altmann <altmann at meteorite-martin.de> a écrit :


> Dear collectors,

>

> it's definitely time again for a Special.

> Today it's about a pretty and fine unequilibrated L3:  NWA 5243

>

> Normally we would have to emphasize the aesthetical aspects of type-3

> chondrites, the colourful variety and density of chondrules, wherefore they

> are so esteemed by the initiate and the beginner likewise.

> Also a good mean for wet the appetite, especially if the stone wouldn't be

> that fresh and pretty than NWA 5243, it could be to refer to the sheer

> rareness of that type - let's see the stats, from the 46,445 entries in the

> Bulltin Database only 563 numbers, finds, falls are an L3-type, among them

> only

> 142 are non-Antarctic,

>

> but let's find a hint, why meteorites in general and in particular the 3ers

> are by far more than simple curios, more than only lumps of rocks, falling

> from time to time from sky with a nice light&sound-show, sometimes leaving a

> hole in the ground.

>

> Please take a look!

>

> http://athene.as.arizona.edu/~lclose/teaching/a202/OriEODsk.gif

>

> http://www.2spare.com/_media/imgs/articles/a43_Protoplanetary.jpg

>

> http://astro.wsu.edu/worthey/astro/html/im-planets/circumstellar-disk.jpg

>

> In what for thrilling times we're living! These pictures show the disks of

> gas and dust around new young stars, only since a few years we are able to

> image these protoplanetary disks directly!

>

> In these disk new planets are formed, it takes only a sneezing, not more

> than 10 millions of years, and the disk will have disappeared and a new

> solar system is born.

>

> Type-3 chondrites bring us closest to that moment, when the first lumps

> condensed and accreted from the circumstellar disk, which once surrounded

> our own Sun. They match closest the matter, which first formed the

> planetesimals, and the planetesimals in turn the planets and the Earth.

> Farther back we can't come.

>

> The chemistry, the minerals, the chondrules, their size and the distribution

> of their size in them

> - all preserved to the best in type-3-chondrites - help us to understand,

> what is going on in these circumstellar disks and finally, where we all stem

> from.

>

> With such a meteorite you have a front row seat in modern space exploration.

>

>

> That's also the reason, why we always recommend a Type-3 if we get requests

> from exhibition planners, and that is the reason for collectors, specialized

> solely in irons, for often choosing an L3 od H3 as their only reference

> piece for a stone meteorite.

>

> NWA 5243 has all a L3 needs, with W2 it is fresher than the average and with

> S2 only weakly shocked.

>

> And the ticket for the time machine costs you today:

> 10$ a gram for the small slices and

> 8$ a gram fort he large ones.

> All slices one side polished, one side grinded and better looking than on

> the photos.

>

> http://www.chladnis-heirs.com/special-nwa5243.html

>

>

> Have a pleasant flight!

>

> Stefan Ralew & Martin Altmann

> Chladni's Heirs

> Munich - Berlin

> Fine Meteorites for Science & Collectors

>

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