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<p>[QUOTE=&quot;bosko69, post: 7284363, member: 16283&quot;]Thanks Charlie &amp; AJ,here&#039;s the quote from Forbes-&#039;&#039;Libyan Desert Silica Glass, as the material is nowadays called.It consists of almost pure silicon-dioxide, like quartz, but its crystal structure is different.&nbsp; It also contains traces of unusual elements, like iron, nickel, chromium, cobalt and iridium. It is among the rarest minerals on Earth&quot;.</p><p>&nbsp; So it&#039;s a Tektite,a byproduct of a meteorite impact in the Libyan Desert.[/QUOTE]</p><p><br /></p>

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