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How to measure
popular gems used in jewelry.
Below
is a pictorial guide on measuring
the most popular
gem stone shapes used in jewelry. Gem shapes depict
faceted cuts but gems cut cabochon and buff top are
measured the same way as the faceted stones.
Round-Shaped Stones
Measured across the widest part.
Oval-Shaped Stones
Measured vertically from the top to the bottom, and
across the widest part.
Pear-Shaped Stones
Measured vertically from the top to the point, and
across the widest part.
Octagon-Shaped Stones
Measured vertically from the top to the bottom, and
across the widest part.
Heart-Shaped Stones
Measured vertically from the top to the bottom, and
across the widest part.
Square-Shaped Stones
Measured vertically from the top to the bottom, and
across the widest part.
Baguette-Shaped Stones
Measured vertically from the top to the bottom, and
across the widest part on straights, or both end
widths on tapers.
See emerald or
princess cut for straight baguette.
Triangle-Shaped Stones
Measured vertically from the base to the point.
Marquise-Shaped Stones
Measured from the top point to the bottom point, and
across the widest part.
Diamond information. Four C's diamond grading chart.
Find more gemstone information.
Visit our
Gemstone pages.
Find carat conversion charts:
Marquise
cut gems,
Octagon
cut chart,
Oval cut
chart,
Pear shape
gems,
Pearls per
inch chart,
Round cut
gems,
Round
diamond carat conversion chart
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