[Jewelry making - Article 00099] - Re: [Orchid] How to Tighten Princess Cut Diamonds?

[David Huffman]

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>     The ring that we used to practice this type of setting was the
>     exact same four-prong setting we used for a round stone. 

    Actually, I spoke with a friend today who went to Blaine's stone
    setting course, and the head Blaine uses for that demo is definitely
    NOT the same as the one used for a round. It's what we call a
    4-prong, peg base (or not) die-struck head. But the one Blaine uses
    is a 4 prong, die stuck, alright, but it's made for princess cuts.
    It's prongs are thicker, shorter, and splay out at a lower angle.
    Check the Stuller findings catalog and compare #21343 (the one Noel
    refered to called the "True Seat") with #411. The desing allows the
    culet to rest just above the bottom of the head, and the extra
    thickness of the prongs allows for the cutting of a groove to seat
    the four quadrant pavillion facet junctures. In that setting, the
    stone would be secure enough that should a prong or two bend away,
    the stone, by its geometry, couldn't escape. I still am not crazy
    about that head, I rather like the extra protection to the points
    that a "V" prong head provides. 

David L. Huffman
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