[Jewelry making - Article 00103] - Re: [Orchid] Flashy Tea

[Bradley Zastrow]

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>        Um....actually, CZ is a synthetic, not a simulant.    James 

    Hi James, It has always been my understanding that a "Synthetic"
    stone is a stone with the same chemical composition/crystal
    structure as a natural one, except that it is grown in a lab.  So
    for example a natural sapphire and a synthetic sapphire are both
    technically a form of Aluminum Oxide (Al2 O3) with a dash of iron
    and titanium for color(blue).  A "simulant" is a stone whose
    chemical structure differs from the natural stone it tries to
    imitate. As I understand it, CZ is technically Zirconium oxide plus
    some yttrium or calcium.  Technically, it occurs vary rarely in
    nature as the mineral baddeleyite, but basically everything on the
    market today is produced in a lab.  In short, CZ is a diamond
    "simulant" because it generally has the look of a diamond but with a
    different chemical structure.  If it were a "synthetic" diamond,
    then its chemical structure would be just C (carbon).  Hope this
    helps.....and for any gemologists out there who feel that I got
    something wrong, feel free to correct me :-) 

-Bradley


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