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I had a chemistry class where the teacher was a collector of phosphorescent stones. One of the stones, it may have been quartz, fluoresced with a beautiful red color.

SWEET! Curtis this is awesome. I'll check over the link later this afternoon. Thank you!!

I know there have been a few posts about minerals that fluoresce when 280nm light is shown on them. But, does anyone know specifically if the thorium within monazite fluoresces when a 280nm laser or say a 300lumen UV flashlight is pointed at it? I could just go out to the field and start looking...

Thanks for replying! i'll be posting some, soon, i hope.

You guys are awesome for posting this stuff. As soon as my tax return comes, I'm going to build the scanners. I question electromagnet vs voice coil, however all is awesome. Modulating lasers, using raster scanning, I'm stoked. Any comments on how to determine which mosfet to use? Thanks...