Forums Beginner Questions Dop for 6x4mm pear shape stone?

  • Alan Balmer

    Administrator
    April 11, 2016 at 2:38 am

    I use a cone dop for pears. I’ve never seen a dop specialized for pears.

  • TownsendWolfe

    Member
    April 12, 2016 at 1:14 am

    This series of pears is a little curious. Two culets and a keel between them, in-line from the center of the big end towards the point of the pear.

    Because of this keel a standard cone dop wouldn’t work. I ended up going to Ace and getting a length of 1/4″ brass rod and making a cone dop 3.85mm (for the 4mm widthd) and then using a jeweler’s triangular file, cut a v-shaped notch. Notch ended up bigger and deeper than I thought but it fits right. Using epoxy now. We’ll see.

  • Alan Balmer

    Administrator
    April 12, 2016 at 3:48 am

    Interesting. Is the design available?

  • TownsendWolfe

    Member
    April 12, 2016 at 1:18 pm
  • Alan Balmer

    Administrator
    April 12, 2016 at 1:28 pm

    Thank you. I see the problem with dopping. An oversized cone would probably still work, but wouldn’t be ideal. An interesting design by Robert Strickland.

  • Gregory Hays

    Member
    April 12, 2016 at 4:11 pm

    I recently cut a 14×10 pear shaped Topaz using one of the Long designs. The pavilion on this design to had an offset and a keel that prevented using the standard cone dop. I ended up doing the same modifying a cone with a vee section. A standard vee Dop would have worked but I felt I needed a little more support the cone section of the modified Dop provided. I have never seen a standard produced vee-coned dop.
    Greg Hays
    The Gem Garden
    San Marcos CA

  • Jon Rolfe

    Member
    April 20, 2016 at 12:44 am

    I have a series of cone dops that have a “V” milled in one side for pears. Years ago I was um.. Maneuvered..into doing a bunch of pears and teardrops for a charity auction. I actually got to enjoy cutting them.

  • gemmakermz

    Member
    April 11, 2020 at 3:39 pm

    just use a regular V dop used for emerald cuts thats what most do or live with small cup.

  • ozgurertan

    Member
    April 13, 2020 at 8:07 am

    Facetron used to have special dops I have one of them depending on the design it is useful.

  • tonyburston

    Member
    April 14, 2020 at 7:17 am

    I have used a standard V dop with a piece of masking tape wrapped around it loose at the top to accommodate the point of the pear and filled it with 5 minute epoxy.
    this supports the vulnerable point.
    The tape usually peels off as soon as it gets wet.

  • Eric Hoffman

    Member
    April 24, 2020 at 9:07 pm

    As gemmakermz said, just use a vee dop for stones with keel culets. You can use a cone dop for pretty much anything with a point culet.

    Especially if you use wax for dopping, or if you use hybrid dopping with a wax “seat” and the stone glued in with CA (aka Crazy Glue). I don’t want to sidetrack the OP and start Ye Ole Dopping Debate, it’s just one of the advantages of using wax 😉

    –Eric

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