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Know More
 Gemstone
Cut
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Like color, there is no generally accepted
grading system for gemstone cut. However, like diamonds, a
gemstone's cut refers to its proportions and symmetry. Valuable
colored gems will usually have a table, crown, girdle, pavilion and
culet just as diamonds do.
Unlike diamonds, gemstones do not
have a geometrically ideal cut to maximize brilliance. For
gemstones, a high-quality cut exposes the fewest inclusions,
displays the majority of the gemstone weight when set in jewelry and
presents the most even color.
A well-cut gemstone is
symmetrical in all dimensions. It appears balanced and its facets
reflect light evenly across the surface, providing good brilliance.
The polish is smooth, without any nicks or scratches.
Its cut
affects the depth of a gemstone’s color. The deeper the cut, the
deeper the color. In a gemstone with more saturated color, a shallow
cut will permit more light to penetrate, while in a less saturated
gem, a deeper cut may increase its vividness.
A sapphire or
ruby should not display the bands of color common to corundum
crystals. If it does show these streaks, the gem was cut for maximum
weight rather than beauty.
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