[Jewelry making - Article 00041] - [Orchid] Oval tube setting

[Mark]

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Hi Folks,

    I've finally got to tackle a job that I've put off as long as
    possible... because I screwed it up the last time I tried it. I've
    got an 8x6 peridot and a cast sterling tube setting... the setting is
    currently mounted on a shellac stick.  The stone is ever-so-slightly
    larger than the seat in the tube setting.  Since it's oval, I can't
    just take a big burr and cut the seat in one shot. What type of burr
    should I use?  Unless I use a cylinder shaped burr, the upper lip of
    the tube would still be to small to admit the stone, right?  That
    would seem to rule out a small hart or round burr, huh?  I don't want
    to "snap" the stone in, as I understand peridot is very fragile...
    even though I've set them before and never broken one (knock on
    wood). I don't think I've ever seen reference to using a cylinder
    burr in stone setting. How would you folks handle such a situation? 


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