[Jewelry making - Article 00429] - Re: [Orchid] CZ-Synthetic

[Betsy Marshall]

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    YAG or Yttrium Aluminum Garnet is a man-made gemstone which, does
    not have a counterpart in nature. It has the basic garnet
    crystallographic structure, but with (AlO4)3 replacing the (SiO4)3
    found in natural garnets.  The full composition is Y3Al2(AlO4)3 ,
    with dopants added to create various colors. 
    (^Info from another site) 

    My impression is that YAG and other manufactured crystals were
    developed for  scientific/industrial laser construction, due to an
    insufficiency of natural usable crystals and the "gem" usage was a
    fortunate by-product. Betsy 



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