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ﺁ sourced from an old collectionﺁ The color intensity and darkness varies considerably from stone to stone
This Europium-doped fluorite is grown for science - these crystals are valuable because they are extremely sensitive to many kinds of radiation (not just UV)
only when looking close with direct point lighting
This means that it shows a mixture of red and green flashes
Faceted Yb:YAG Gemstones, Light Blue Fantasy Cut Laser Garnets yap ﺁ sourced from an oldThese are faceted light blue ytterbium YAG, a type of blue laser garnet. The color varies from light greyish blue to more saturated blue green. Yb: YAG is an uncommon type of YAG, grown for use in some infrared lasers including ones used for high power engraving. While it is used in a variety of infrared laser systems it is surprisingly hard to actually get as industrial scrap this is because the material is usually annealed immediately after growth,
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