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
[EMAIL PROTECTED] wrote: -----
To: "'[EMAIL PROTECTED] '"
<[EMAIL PROTECTED]>,
"'[EMAIL PROTECTED] '"
<[EMAIL PROTECTED]>
From: "Matson, Robert" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
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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