SYMMETRY
In addition to the symmetry considerations for rounds, also check for:
• Culet or Keel off-center (C/oc, K/oc)
• Culet Placement on pears and hearts (CP1)
• Uneven Bulge on step cuts (UB)
• Uneven Outline (UO), which can include:
Sides not parallel on step cuts
Uneven corners on step cuts
Uneven wings on marquises, pears, and hearts
Uneven lobes on hearts
Uneven shoulders on pears and ovals
SHAPE APPEAL
Even a perfectly symmetrical fancy-cut diamond might not have a grace¬ful and pleasing shape, and that's where shape appeal comes in. To judge shape appeal, you need to consider a diamond's face-up appearance in relation to others of the same shape and cutting style. It shouldn't differ too much from the typical proportions for its shape and style, although some proprietary and custom cuts do deviate intentionally. These are some shape appeal variations:
• Narrow or No Corners on step cuts (NC)
• Wide Corners on step cuts (WC)
• High Shoulders on pears or ovals (HS)
• Flat Wings on marquises, pears, or hearts (FW)
• Bulged Wings on marquises, pears, or hearts (BW)
• Undefined Point on marquises, pears, or hearts (UP)
• Misshapen Lobes on hearts (ML)