[meteorite-list] MOLDAVITE COLORS

From: Steve Dunklee <steve.dunklee_at_meteoritecentral.com>
Date: Fri, 10 Dec 2010 14:16:35 -0800 (PST)
Message-ID: <137725.31497.qm_at_web113901.mail.gq1.yahoo.com>

ok im dumd here. What is a muong nong tektite i know i spelled it wrong. What do they look like and what is the composition?

On Fri Dec 10th, 2010 3:39 PM EST Sterling K. Webb wrote:

>Hi, List, and Mike Gilmer who asked originally,
>
>Yes, Mike, it is the iron.
>
>Moldavites are high in Si02, usually close to
>80%. that is, they have a higher "glass" content
>and fewer "minerals." The most common other
>ingredient is Al203, from 8% to 10%. Fe0 makes
>up only 1% to 2%, and it is this iron-poor recipe
>that makes them green and gem-like.
>
>Moldavites range in color from a very pale green
>to a brown that can be as dark as a light Indochinite.
>The color is determined by an increase in the ratio
>of trivalent iron over bivalent iron over the range of the
>green-to-brown spectrum. The index of refraction and
>the density increases in the same way.
>
>Almost every type of splash-form known from the
>Australo-Asian strewnfield are found in moldavites
>as well, but "drops" and "dumbbells" are rare. There
>are Muong-Nong moldavites found in the Budejovice
>region, but no aerodynamic buttons have ever been
>found.
>
>Moldavites have many forms unique to them, like the
>"leaf" type. Moldavites frequently contain trains of
>gas bubbles, Occasionally, a two-colored moldavite
>is found, formed when two plastic moldavites collided
>in flight and stuck together. And Bog Haag has the
>one and only known YELLOW one.
>
>And while I typed this and checked the figures, the
>question was answered already...
>
>
>Sterling K. Webb
>--------------------------------------------------------------------
>----- Original Message ----- From: "Chris Spratt" <cspratt at islandnet.com>
>To: <meteorite-list at meteoritecentral.com>
>Sent: Friday, December 10, 2010 12:15 PM
>Subject: Re: [meteorite-list] Mineral responsible for green color inMoldavite?
>
>
>> I think it may be a form of Beryilium or Beryl.
>>
>> Chris. Spratt
>> Victoria, BC
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Received on Fri 10 Dec 2010 05:16:35 PM PST