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Gemstones, Minerals & Fossils
Lapidary
Cristinite creation
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<blockquote data-quote="Mr Magoo" data-source="post: 344149" data-attributes="member: 3008"><p>If anything Lefty we're all learning heaps about light travel through a stone. Try sticking the design on GemCad <u>not</u> Gem Ray and with the Raytrace option see where the light enters and leaves the stone.</p><p>I'm fairly sure that it'll explain it, I was intending to type it but it sounded more like an incoherent ramble.</p><p></p><p>This is a good example of why steep ends are required on some Tourmaline to avoid the mixing of colours - although that is generally referring to the 'c' axis. But I think if you cut the ends steeper the colour would not mix.....................much.</p></blockquote><p></p>
[QUOTE="Mr Magoo, post: 344149, member: 3008"] If anything Lefty we're all learning heaps about light travel through a stone. Try sticking the design on GemCad [u]not[/u] Gem Ray and with the Raytrace option see where the light enters and leaves the stone. I'm fairly sure that it'll explain it, I was intending to type it but it sounded more like an incoherent ramble. This is a good example of why steep ends are required on some Tourmaline to avoid the mixing of colours - although that is generally referring to the 'c' axis. But I think if you cut the ends steeper the colour would not mix.....................much. [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Cristinite creation
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