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Gemstones, Minerals & Fossils
Gemstones and Minerals
UV light ranges & use for Gemstones
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<blockquote data-quote="LONEWOLF" data-source="post: 671056" data-attributes="member: 6309"><p>Yes but for rock viewing under 365 is best so that rules out the black light in most cases...... Some rocks like Mangano-calcite will glow under any source of UV if Heat treated. above 400deg C for 4hrs and left to naturally cool... Then they really pop with colour...</p><p></p><p>On another note, You can have 5 stones like Rubies from the same location and only 1 or 2 might glow... Or even none... Up to nature to decide that one..</p><p>.</p><p> LW...</p></blockquote><p></p>
[QUOTE="LONEWOLF, post: 671056, member: 6309"] Yes but for rock viewing under 365 is best so that rules out the black light in most cases...... Some rocks like Mangano-calcite will glow under any source of UV if Heat treated. above 400deg C for 4hrs and left to naturally cool... Then they really pop with colour... On another note, You can have 5 stones like Rubies from the same location and only 1 or 2 might glow... Or even none... Up to nature to decide that one.. . LW... [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
UV light ranges & use for Gemstones
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