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This material is trichroic (meaning it shows three different colors depending on the direction you look through the stone
Natural Topaz: A big crystal of natural topaz
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)
It's the hardest gem that can feasibly be cut into a die and it is more brilliant than a diamond
The smaller piece weighs in at 34g and measures 23
Faceted Yb:YAG Gemstones, Light Blue Fantasy Cut Laser Garnets yap This material is trichroic (meaningThese 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,
US$ 255.00
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