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Patina |
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Patina
is a unique satin finish that
develops on the surface of platinum
over time. |
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Pavé
Setting |
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In
pavé setting, diamonds
are set into small holes and
set level with the surface of
the ring. They are set in rows,
giving the appearance of the
diamonds having been paved (Pavé
is French for paved).
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Pavilion |
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The
bottom portion of the stone,
under the girdle,
measuring to the culet.
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Pavilion
Angle |
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The
angle between the pavilion
main facets and the girdle
plane. The steeper the pavilion
angle, the greater the pavilion
depth percentage. |
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Pavilion
Depth Percentage |
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The
distance from the girdle plane
to the culet,
expressed as a percentage of
the average girdle diameter.
If it is shallower than 38%,
the diamond will look dull and
have a fisheye
effect. If it is deeper than
47%, it will look darker in
the center and have a nailhead
effect. Pavilion
angle is a different way
of looking at a diamond’s
proportions: the steeper the
angle, the greater the depth
percentage.
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Peacock |
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One
of the three colors associated
with Tahitian cultured pearls,
peacock pearls are a dark green-gray
to blue-gray with rosé
to purple overtones.
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Pear-shaped |
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A
brilliant-cut fancy shaped diamond
that resembles a teardrop. |
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Pinpoint
(Pp)
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A
very small included crystal
that looks like a tiny dot at
10x magnification. |
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Pistachio |
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One
of the three colors associated
with Tahitian cultured pearls,
pistachio pearls are yellowish
green to greenish yellow |
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Pit
(Pit) |
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A
small clarity characteristic
that looks like a tiny white
dot. |
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Platinum |
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Platinum
is a popular metal used for
engagement rings and other fine
jewelry because it is naturally
white, very strong, resists
tarnishing and is hypoallergenic.
It is denser than gold so a
piece of platinum weighs over
a third more than the same piece
made of 18k gold. The rarity
of platinum and the purity of
platinum jewelry (95% platinum,
5% alloy) means that its price
is generally higher than that
of gold. All of our platinum
jewelry is marked Platinum,
PT, PT 950 or Plat. |
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Platinum
Group Metals |
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There
are six platinum group metals
(PGM): platinum, iridium, osmium,
palladium, rhodium, and ruthenium.
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Plot |
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A
color-keyed diagram of a gemstone's
significant clarity characteristics
on a laboratory grading report.
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Points |
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Each
carat in a diamond’s weight
is divided into 100 parts, called
points. A 1-Carat diamond has
100 points, a 1/2 Carat has
50 points, etc. Points in a
fraction of one carat are measured
within ranges, so that a 3/4
Carat diamond may have between
.69 and .82 points and still
be considered a 3/4 carat. |
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Polish |
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A
diamond’s polish is a
good indication of the diamond
cutter’s skill and attention
to detail. The finer the polish,
the brighter and more lustrous
the diamond will be. This indicates
the care taken by the cutter
in shaping and faceting the
rough stone into a finished
and polished diamond.
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Polish
Lines (PL)
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Fine,
tiny transparent or white parallel
lines left by polishing that
can occur on any facet |
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Polish
Marks (PM) |
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Hazy,
surface areas that results from
excessive heat or from uneven
polishing. Also called burn
marks or burned facets. |
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Princess
Cut |
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A
square or sometimes rectangular
modified brilliant-cut diamond.
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Prong |
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It
consists of four or six claws
that cradle the diamond. Because
this setting allows the maximum
amount of light to enter a stone
from all angles, it sometimes
can make a diamond appear larger
and more brilliant than its
actual weight. This setting
can also hold larger diamonds
more securely. |
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Prong
Setting |
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In
a prong setting, the diamond
is held in place by a number
of metal prongs, which rise
above the main body of the ring
and are bent over the stone
to hold it in place. The number
of prongs varies according to
the stone’s shape, as
does their height above the
main body of the ring.
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Proportions |
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Proportions
are the dimensions and angles
of a diamond and the relationships
between them, including table
size, crown
angle, crown height, pavilion
angle, pavilion depth, culet
size, girdle
thickness, girdle outline, length-to-width
ratio and total depth.
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