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It is trichroic
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It is used to help detect invisible radiation by absorbing it and converting it to easily-detected visible light--gamma rays and x-rays will activate its glow in addition to UV and even normal blue light
Though the gem world sometimes thinks of it only as a diamond stand-in I prefer to think of it as a gem all its own
CTH:YAG Jewelry, Green laser garnet in sterling silver Type:Round Stud Earring (8mm) Pair It is trichroicThese are lab created green laser garnets, aka CTH YAG. Each cut stone can be purchased individually. This is a classic laser gem, CTH YAG. Like normal Cr YAG (aka Christmas Garnet) it has a super rich green base color, but the addition of thulium and holmium changes things the thulium grabs the emitted energy from the chromium, splits it into two packets, and gives it to the holmium to emit as infrared. This means the green base color does not have
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