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

This material is trichroic (meaning it shows three different colors depending on the direction you look through the 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)

Natural Topaz: A big crystal of natural topaz

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,