[meteorite-list] Heating tektites

From: ajones_at_siliconspace.com <ajones_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:55 2004
Message-ID: <OFE72496A5.9DD5292C-ON88256E65.00744543-88256E65.00744547_at_siliconspace.com>

Hi Rob and List;

I work in art glass as a hobby and experimented a few years ago with a
small green moldavite. I crushed it down to small bits (approx. 10mm dia.)
and then heated the lot to about 1000F and attached it to the outside of a
gather of molten glass. I then heated this mass to approx. 2400F for
several minutes. At this temperature the moldavite glass never seemed to
really melt (it remained as semi-hard bits on the molten mass). Upon
cooling, the moldavite glass reverted to the same color as it started,
although it did seem to have a slight metallic tinge usually associated
with glass that has been reduced (as in exposure to a low oxygen flame).

Best Regards, Art

-----meteorite-list-admin_at_meteoritecentral.com wrote: -----
To: "'meteorite-list-admin_at_meteoritecentral.com '"
"'meteorite-list_at_meteoritecentral.com '"
From: "Matson, Robert" <ROBERT.D.MATSON_at_saic.com>
Sent by: meteorite-list-admin_at_meteoritecentral.com
Date: 03/28/2004 12:25PM
Subject: [meteorite-list] Heating tektites

Hi All,

I have an unusual question for the group: what happens to a tektite
when you heat it up to its melting point and then let it cool back
down? Aside from any plastic changes in the shape, are there any
color effects? I wouldn't have thought so, but I've been told of
cases of "heat-treating" tektites to drastically alter their color,
and I wondered if it was a bunch of baloney. --Rob

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Received on Sun 28 Mar 2004 04:09:59 PM PST

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