[Jewelry making - Article 00423] - Re: [Orchid] 'ct' and 'ctw' ?

[Don Rogers]

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    Both ct and ctw refer to the metric carat, or 1/5th of a gram. The
    difference is the ct normally applies to a single stone, IE  A
    2.67ct ruby. The ctw or tcw refers to the total weight of multiple
    stones.  IE a ring the has six accents diamonds for "1.20ctw".  This
    means the there were six stones with an average ct wt of 0.20ct in
    size in the ring for the 1.20ctw.  It could also apply to a parcel
    of loose stones, Don  


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