The appearance, or extent, of internal and external reflections of "white" light seen in a polished diamond when it is viewed face-up.
A description of the care that went into the crafting of a polished diamond, as seen in the finish (polish and symmetry) of the diamond.
Decisions made during the fashioning process that determine a diamond's physical shape, as seen in a diamond's proportions, weight ratio, and durability.
The characteristics of a polished diamond that accounts for the risk of damage inherent in its proportions (i.e., the risk of chipping in diamonds with extremely thin girdles).
The sum appearance (brightness, fire, scintillation) of a polished diamond when it is viewed in the table-up position. This appearance includes what is seen when the diamond is "rocked" or "tilted."
The appearance, or extent, of spots of light dispersed into spectral colors seen in a polished diamond when it is viewed face-up.
A calculated numerical result obtained through computer modeling; for the GIA diamond cut research project, metrics were calculated for brightness and fire for both hypothetical and actual diamonds.
Overall Cut Appearance and Quality
A description of a polished diamond that includes the face-up appearance, design, and craftsmanship of that diamond.
1. Sparkle: The appearance, or extent, of spots of light seen in a polished diamond when it is viewed face-up that flash as the diamond, observer, or light source moves.
2. Pattern: The relative size, arrangement, and contrast of bright and dark areas that result from the internal and external reflections seen in a polished diamond when it is viewed face-up while that diamond is still or moving.
A description of a diamond's overall weight in relation to its diameter.