[meteorite-list] Re: Meteorite "Scratch Test"?

[RYAN PAWELSKI]

So, hypothetically, if you're not supposed to be able to scratch the fusion crust of a meteorite with a sharp object such as a knife, how do meteorites such as Bensour receive "skid marks" when landing on sharp stone surfaces?

Ryan

-----Original Message-----
From: "Matson, Robert" <ROBERT.D.MATSON at saic.com>
Sent: Apr 9, 2005 12:10 AM
To: 
	"'meteorite-list-bounces at meteoritecentral.com '" <meteorite-list-bounces at meteoritecentral.com>, 
	''Meteorite List ' ' <meteorite-list at meteoritecentral.com>
Subject: [meteorite-list] Help with meteorwrong ID

Hi All,

Continuing the mini-thread on extraterrestrial wannabes, I've uploaded
some images of an achondrite meteorwrong that I found recently.  (For
the few list members that have already assisted me in identifying the
rock in question, these images are slightly better quality):

http://members.cox.net/mojave_meteorites/Meteorwrong1.jpg
http://members.cox.net/mojave_meteorites/Meteorwrong2.jpg
http://members.cox.net/mojave_meteorites/Meteorwrong3.jpg
http://members.cox.net/mojave_meteorites/Meteorwrong4.jpg
http://members.cox.net/mojave_meteorites/Meteorwrong5.jpg

The fourth image shows the windowed interior.  I welcome any of our
rock experts to offer opinions on probable ID -- gabbro, black granite,
diorite, etc.  Specific gravity is ~3.0, and rock has no paramagnetism.
I was able to scratch the black surface with a pocket-knife; haven't
tried the white inclusions yet.  No streak on a streak plate.  --Rob
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