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Bad jade, no biscuit :D
Jun. 9th, 2009 07:43 pmDeliberately scouted out the yellow "jade" beads along the right at the gem show this weekend; the yellow jade magatama in the middle are nephrite from a commissioned factory run some years ago, and the arc of beads along the left are various colors of uranium glass:
Same beads under near-UV light. Note the lime-green fluorescent glow from all of the beads. The magatama are picking up some reflections from their surroundings, but do not actually glow on their own:
The yellow "jade" beads are almost certainly a uranium-based glass or ceramic. As counterexamples, there were numerous other tables (and even some different strands at the same tables these came from) with otherwise identical-looking and identically-priced beads without the green glow. Which doesn't nec'ly mean that those were made of actual stone either, but hey.
Same beads under near-UV light. Note the lime-green fluorescent glow from all of the beads. The magatama are picking up some reflections from their surroundings, but do not actually glow on their own:
The yellow "jade" beads are almost certainly a uranium-based glass or ceramic. As counterexamples, there were numerous other tables (and even some different strands at the same tables these came from) with otherwise identical-looking and identically-priced beads without the green glow. Which doesn't nec'ly mean that those were made of actual stone either, but hey.