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It has exceptionally good normal optical properties too
These are faceted golden laser garnets (Ce+Nd Yttrium Aluminum Garnet)
It has an unusual peach-orange color
only commercially available for technical applications in 2014
Unfortunately I missed out on all of that on account of being born that year
Faceted Er-Nd Soviet Laser Garnets, Calibrated Color Change (Orange-Pink) YAG Gemstones Stone:Square, 9mm, avg ~5.8ct It has exceptionally good normalThese are faceted stones of an unusual experimental laser garnet from the Soviet union, codoped with Erbium and (likely) neodymium. The base color ranges from orange pink to purple pink, and they color change from more orange to more pink depending on the light source. This is a new material for us from an old collection, a 40 year old failed experimental laser garnet from the Soviet Union. It is clearly doped with Erbium, and like our modern pure Er: