Determine a Diamond’s Value
SHAPE AND CUTTING STYLE
The outline of the diamond (shape) and the pattern of the facet arrangement
Diamond dimensions listed as “minimum diameter – maximum diameter x
depth” for round diamonds and “length x width x depth” for fancy-shaped
Weight given in carats, recorded to the nearest hundredth of a carat. One carat
is equal to 1/5 of a gram.
The absence of color ranging from colorless to light yellow or brown when
compared to GIA Master Color Comparison Diamonds. Graded on a D-to-Z scale. If
“*” appears next to the color grade, a color treatment was detected.
The relative absence of inclusions and blemishes. Graded on a scale from
Flawless to Included based on size, nature, number, position, and relief of
characteristics visible under 10x magnification.
CUT GRADE (Excellent to Poor)
For standard, D-to-Z color, round brilliant diamonds. Cut grade incorporates the
aspects of face-up appearance, design, and craftsmanship. Graded on a scale from
Excellent to Poor.
POLISH (Excellent to Poor)
Smoothness of the diamond’s surface, assessed on a scale ranging from Excellent to Poor.
SYMMETRY (Excellent to Poor)
The exactness of the diamond’s outline, and the shape, placement, and alignment of its facets.
FLUORESCENCE (Indiscernible to Very Faint)
Strength and color of the diamond when viewed under long-wave ultraviolet