Forums Beginner Questions Round Brilliant For Sunstone?

2 replies, 2 voices Last updated by  danointhenw 2 months, 2 weeks ago
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  • #3473

    danointhenw
    Participant
    @danointhenw

    After working on a novice competition stone since what seems like forever, I finished and finally got a chance to put a nice sunstone I had on the dop. A buddy had a diagram for “a round brilliant for sunstone” that has a better angle for sunstone’s RI. After cutting the girdle to width and the P1 cuts, I finally realized that the diagram seems to be laid out for cutting the crown first…oops…
    It then dawned on me that it was probably going to be impossible to cut the crown according to the diagram which shows cutting the table 1st (!??).
    After thinking about it, my question is this, I think I SHOULD be OK if I reverse the crown cuts, I.E., do the C4s first to get my meets at the bottom of where I want the girdle width, and then work my way up to the table.
    Diagram is for a 96 index.
    This stone is either going to be 2cts of awesome sauce or a hot mess and I hope the former.

    #3474

    tucsonbear
    Participant
    @Tucsonbear

    I always cut the table last. Lay in your break facets first and get the girdle thickness you want, then the mains, then the stars. I then polish in the reverse order (stars, mains, breaks). Then the table. My machine won’t go to 0°, so I have to take it out and use a table adapter.

    I have cut a lot of transparent yellowish orthoclase, but I’ve never done any sunstone. Like to see a pic when you’re done.

    #3487

    danointhenw
    Participant
    @danointhenw

    Thanks TB, I will (if there’s anything left…)

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