Faceted Yb:YAG Gemstones, Light Blue Fantasy Cut Laser Garnets yap ﺁ sourced from an old

ﺁ  sourced from an old collectionﺁ  The color intensity and darkness varies considerably from stone to stone

Each is pictured individually

This means that it shows a mixture of red and green flashes

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)

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,