[meteorite-list] Re: TEKTITES vs. Obsidian

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From: Impactika_at_aol.com <Impactika_at_meteoritecentral.com>
Date: Thu Apr 22 10:08:32 2004
Message-ID: <fb.2ca4bd43.2ac3cd1f_at_aol.com>

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In a message dated 9/25/2002 11:06:06 AM Mountain Daylight Time,
jonee_at_epix.net writes:

> An additional hobby of mine is natural glass and I've examined samples
> from many areas of the world including impact, tektite, atomic, and
> volcanic as well as for contrast slag glass and ancient man-made glass.
>

Did you have the occasion to take a good look at Wabar pearls?

I got a few more at the Denver Show, mostly "odd-shaped" ones, often meaning
that they are chipped or broken.
I have been looking at the broken ones and was rather surprised. I was
expecting them to be glassy all the way through like Libyan Glass or
Moldavite, but that is not the case at all. I found that they are composed of
a glassy outer shell packed with tiny black grains of sand (I suppose)
tightly packed and glued together.
It looks as if the vitrification process was incomplete, only the outer layer
turned to glass.

Any comments?

Anne Black
IMCA #2356
www.IMPACTIKA.com
e-mail: IMPACTIKA_at_aol.com

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<HTML>In a message dated 9/25/2002 11:06:06 AM Mountain Daylight Time, jonee_at_epix.net writes:
 
 
 <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">An additional hobby of mine is natural glass and I've examined samples
 from many areas of the world including impact, tektite, atomic, and
 volcanic as well as for contrast slag glass and ancient man-made glass.
 </BLOCKQUOTE>
 
 Did you have the occasion to take a good look at Wabar pearls?
 
 I got a few more at the Denver Show, mostly "odd-shaped" ones, often meaning that they are chipped or broken.
 I have been looking at the broken ones and was rather surprised. I was expecting them to be glassy all the way through like Libyan Glass or Moldavite, but that is not the case at all. I found that they are composed of a glassy outer shell packed with tiny black grains of sand (I suppose) tightly packed and glued together.
 It looks as if the vitrification process was incomplete, only the outer layer turned to glass.
 
 Any comments?
 
 Anne Black
 IMCA #2356
 www.IMPACTIKA.com
 e-mail: IMPACTIKA_at_aol.com</HTML>

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Received on Wed 25 Sep 2002 10:38:23 PM PDT

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