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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)
only when looking close with direct point lighting
The smaller piece weighs in at 34g and measures 23
Faceted Yb:YAG Gemstones, Light Blue Fantasy Cut Laser Garnets yap Natural Topaz: A big crystalThese 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$ 2500.00
US$ 1999.50
US$ 2999.50
US$ 599.50
