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rendering them inoperable
Super S or any other number of regional variations
These unfortunately also cause unavoidable scratching in the final polish but they also add a rainbow sheen when viewed from the right angle
Previously offered only in-person at gem shows
Super Cerium YAG Extra Bright Facet Rough Neon Yellow Marked Letter:1pc 3.3g rendering them inoperableThis is 'super' cerium YAG with a brighter glow and more orange color than other normal Ce: YAG. This was custom grown for us with a formula we developed from advanced phosphor research similar material has probably only ever been grown as powders. Each piece of rough is available individually. Cerium YAG has been grown since the 50s for its incredible yellow fluorescence. It used to be widely used as a scintillator for detecting radiation but it has