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Re: which meteorites deteriorate...which are bad investments?

> This list is from memory, I am certain there are others.  It is true that
> careful storage will minimize much of this.

It is my experience that Bjurbole is extremely fragile. 
> 3.  As discussed, within some decades, rocks from the moon, Mars, and
> asteroids will be imported to earth, very possibly diminishing an
> investment (I think its fairly certain that lunar meteorites will decrease
> in value when moon rocks are available).

Our successors will still be interested in meteorites, but the investors
and the public in general will lose interest. If you want to invest, I
suggest you do so in stocks and mutual funds, which you can pass to the
next generation. Meteorites, in the long run, are probably not such a
good idea, unless you just want to hold in your hand a piece of space. 
> 4.  There are very good opportunities for dishonest people in this field.
> Some rare meteorites are easy to fake with other meteorites, or gravel, or
> concrete, and unless sophisticated tests are run on them, some are hard to
> detect.  If several fake meteorites were to be widely disseminated, the
> value of all could be significantly diminished.  It is reassuring that the
> only flagrant examples of this to date (that I'm aware of) are Bethany's
> substitutions 

Umm, if anyone knows of other Bethany 'substitutions' (fraud is a better
word) I _really_ would like to know. I am no longer their customer,
still a good percentage of my collection came from them. 

What meteorites decay? Mine do, at least the pallasite micromounts. The
stones and irons (including Miles) do fine, but not the stony-irons.

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