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| Turley Jewelers has in stock an array of G.I.A.
certified diamonds. The inventory of diamonds is fluid and changes
daily. Please contact Turley Jewelers for information on a specific
diamond.When looking at diamonds, Eddie refers to the 4C's as
the basic buying guide; Cut, Color, Clarity, and Carat. |
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| CUT
The cut of a diamond refers to its proportions. Of the
4C's, the cut is the only characteristic directly influenced
by man (i.e. the cutter or manufacturer of the stone).
The other three C's are dictated by nature alone. The
cut of a diamond should not be confused with its shape.
Diamonds are cut into various shapes depending upon the
original form of the uncut rough diamond. Whatever the
shape, a well-cut diamond is better able to reflect light.
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| A diamond's ability to reflect light determines
its display of fire and brilliance. Diamonds are usually cut
with 58 facets, or separate flat surfaces. These facets follow
a mathematical formula and are placed at precise angles in relation
to each other. This relationship is designed to maximize the
amount of light reflected through the diamond and to increase
its beauty. When a diamond is cut to proper proportions, light
is reflected from one facet to another and then dispersed through
the top of the stone. When the cut of a diamond is too deep,
some light escapes through the opposite side of the pavilion.
When the cut of a diamond is too shallow, light escapes through
the pavilion before it can be reflected. |
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The cut, or
proportions, of a diamond is measured in percentages relative
to the diameter of its girdle. The girdle diameter of
each diamond is always considered 100%. Example: The girdle
of a diamond measures 10 millimeters (100%). The table
measures 5.6 millimeters. The total depth measurement
is 6.1 millimeters. The diamond would be described as
having a table of 56% and a depth of 61%. The table and
depth percentages are the key to determining good proportions.
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| COLOR The
best color is no color. Diamonds allow light to be reflected
and dispersed as a rainbow of color. This light dispersion,
or color flash, has no effect on the technical grading of color.
The absolute finest colorless stone carries a D rating, descending
through each letter of the alphabet to Z, designating a diamond
of light yellow, brown, or gray. This body color may be caused
by the presence of trace elements, such as nitrogen, within
the atomic framework of the carbon crystal. These trace elements
are so minute that they are scientifically measured in parts
per million (p.p.m.). As the body color becomes more intense,
the grade for color descends the scale. When directly comparing
diamonds for color, most people are unable to detect a difference
unless they are at least two or three color grades apart. Most
professionals use a comparison method to determine the color
of a stone. It is often surprising to learn that diamonds also
occur by rare accidents of nature in shades of pink, blue, green,
amber, or even red. These rarely occurring colors are referred
to as fancies and are evaluated by a different set of color
standards.These standards take into consideration various factors
such as hue and saturation. Fancy colored diamonds are the most
expensive because of their extreme rarity. |
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| CLARITY
Almost all diamonds contain very tiny natural birthmarks known
as inclusions. To determine a diamond's clarity, an expert views
it under 10 power magnification. In addition to internal inclusions,
surface irregularities are referred to as blemishes. These two
categories of imperfections, inclusions-internal, and blemishes-external,
make up clarity. The fewer the imperfections, the rarer and
more valuable is the diamond. Many inclusions are not discernable
to the naked eye and require magnification to become apparent.
A laboratory-certified clarity rating of SI2 represents the
point at which inclusions are technically not apparent to the
average naked eye. Clarity is graded using a very precise and
complex method of evaluating the size, location, and visibility
of inclusions. |
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| CARAT
Most people compare carat weight to size. The larger the
diamond the more it weighs. The weight of a diamond is
expressed in carats. The word carat originated from the
carob tree or Ceratonia siliqua. The tiny seeds of this
tree are well known for their uniformity and consistent
weight. Traditionally diamonds and gemstones were weighed
against these seeds until the system was standardized,
and one carat was fixed at 0.2 grams. One carat is divided
into 100 points. A diamond weighing one quarter of a carat
can also be described as weighing 25 points or 0.25 carats.
Points are generally not used to describe weights over
one carat. The rarity of a diamond is greatly affected
by its size. The rarity of a 1.00 carat diamond is much
greater than twice that of a .50 carat. Although it only
weighs twice as much, the 1.00 carat is statistically
much more difficult (rare) to mine than the .50 carat. |
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