[Jewelry making - Article 00353] - Re: [Orchid] Diamond cutting

[Mark Shneyer]

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Hi Noel,

    Well the GG's can probably explain this better but diamonds were
    (and are?) cleaved. Technology has changed making a variety of
    changes in the process easier but a good skilled cutter will still
    yeild more from the rough material than a rookie and that's the key. 
    How to cut and what to cut from each piece of rough. (ps, rd, mq,
    em, etc) It is important to get the best $ yeild of quality and size.
     This is of course refering to diamonds. 

    The old miners (fat and squarish) where cut to keep most of the
    original octahedron intact and not loose weight.  Cleaving allowed
    the yeilding of two stones from an octahedron. One larger and one
    smaller (table to table in the rough) yeilding stones that could be
    polished more to their "ideal proportions". 

    Lazer's make things possible like the grooves needed for invisible
    set diamonds.  I'm sure there is a lot more that I don't know or
    remember from my GIA days but this should answer your question. 

Mark

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