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Gemstones, Minerals & Fossils
Gemstones and Minerals
Heat treating Cambodian zircon
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<blockquote data-quote="Pete&#039;s Pick" data-source="post: 464478" data-attributes="member: 13734"><p>Wally, </p><p>I packed it into a graphite crucible with crushed heat beads and heated for two hours at around 900C in an electric furnace. The aim - to generate a reducing atmosphere.</p><p>The stone went in as shown and came out white diamond clear. Apparently some do that rather than turn blue.</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/13734/1547370268_223278215177_1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>It has amazing second order colours in bright light and although the photo is poor, it is a really bright and<img src="https://www.prospectingaustralia.com/forum/img/member-images/13734/1547370749_20190113_190926.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> impressive stone.</p></blockquote><p></p>
[QUOTE="Pete's Pick, post: 464478, member: 13734"] Wally, I packed it into a graphite crucible with crushed heat beads and heated for two hours at around 900C in an electric furnace. The aim - to generate a reducing atmosphere. The stone went in as shown and came out white diamond clear. Apparently some do that rather than turn blue. [img]https://www.prospectingaustralia.com/forum/img/member-images/13734/1547370268_223278215177_1.jpg[/img] It has amazing second order colours in bright light and although the photo is poor, it is a really bright and[img]https://www.prospectingaustralia.com/forum/img/member-images/13734/1547370749_20190113_190926.jpg[/img] impressive stone. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Heat treating Cambodian zircon
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