diamond appraisal

PLOTTING

 

PLOTTING - Mapping Stone.

WHY?

  • To identify the stone.<FINGER PRINT> of stone.
  • To document it's present

    condition.

    To justify or support it's

    clarity grade.

    Clouds inside diamond don't

    need to be plotted just a comment on the bottom of certificate, ALSO bearding

    can be mentioned by comments.

    WHEN DO WE PLOT STONES?

     

    1. After clarity grade is MADE.
    2. Before color grade.
    3. Your stone is put next to master stones (5 stones).
    Fun TIP: Master stones are stones with already color grade.

     

    WHAT TO PLOT:

    • Grade setters, makes a difference to it's clarity.
    • In Class, Plot only inclusions, but plot blemishes if it identifies stone easily.
    • Blemishes except Naturals (no occurrence and Extra Facets a window that is not plotted).
    • Bearding is not plotted, except when bearding is grade setter.
    • DO NOT Plot Reflections ( not also commented on in comments.
    • Plot only when grade setter reflection.
    • Do not plot Tweezer reflections
    • Do not plot Dust
    • Do not plot Laser inscribed #'s
    • ( GIA # on girdle 12345 EXAMPLE) Put only under comments Ex:"inscription presents Laser Inscribed "GIA. then the number 12345"
    Fun TIP: Reflector inclusions are an inclusion that reflects in the diamond but is only one or the same one not plotted or commented, but could gradually effect the clarity grade a tiny bit.