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Gemstones, Minerals & Fossils
Gemstones and Minerals
fluorescent gemstones
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<blockquote data-quote="user 4386" data-source="post: 294049" data-attributes="member: 4386"><p>B5MECH - I hope you are satisfied with what you bought. It is advertised as 5W there but 3W on other sites - anything around 4W would normally be pretty useless (too weak). UV light is the wavelength = UV-A is 400-315 nm, UV-B is 315-280 nm, UV-C is 280-100 nm wavelength. The torch you have bought is a total range of 395-410 nm, and 400-410 nm is not UV at all but visible light (so it is an unfiltered UV source that will make it less effective because of visible light interference). And you are only getting 395 - 400 nm in the UV range - a total of 5 nm for UV that ranges from 100-400 nm, so you are getting only one sixtieth of the range of UV light, I would be surprised if rubies would fluoresce at all with the torch, as most fluoresce around 300 nm. It is a bit like buying a small electronics kit solderng iron to do a welding job - probably won't do anything useful unless you are working with tinplate. That is why I posted the details on what is needed - but good luck. The fact that something like that works with, say, manganocalcite, does not mean it will necessarily work with, say, ruby or scheelite, as each minerasl has its own fluorescence range.</p></blockquote><p></p>
[QUOTE="user 4386, post: 294049, member: 4386"] B5MECH - I hope you are satisfied with what you bought. It is advertised as 5W there but 3W on other sites - anything around 4W would normally be pretty useless (too weak). UV light is the wavelength = UV-A is 400-315 nm, UV-B is 315-280 nm, UV-C is 280-100 nm wavelength. The torch you have bought is a total range of 395-410 nm, and 400-410 nm is not UV at all but visible light (so it is an unfiltered UV source that will make it less effective because of visible light interference). And you are only getting 395 - 400 nm in the UV range - a total of 5 nm for UV that ranges from 100-400 nm, so you are getting only one sixtieth of the range of UV light, I would be surprised if rubies would fluoresce at all with the torch, as most fluoresce around 300 nm. It is a bit like buying a small electronics kit solderng iron to do a welding job - probably won't do anything useful unless you are working with tinplate. That is why I posted the details on what is needed - but good luck. The fact that something like that works with, say, manganocalcite, does not mean it will necessarily work with, say, ruby or scheelite, as each minerasl has its own fluorescence range. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
fluorescent gemstones
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