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About Diamonds
(Diamond FAQ) |
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The Four
most
popular
factors
used to
measure
diamond
quality
are:
Color,
Carat,
Clarity
and Cut.
Topics
to
discuss
are
Diamond
Color
Clarity
Grade,
Diamond
Grades
Quality
Information
&
Diamond
Grade
Scale. |
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Diamond
Color:
Degree
to which
a
diamond
is
colorless
Diamond
Clarity:
Presence
of
inclusions
in a
diamond
Diamond
Carat:
Weight
of a
diamond
Diamond
Cut:
Angles
and
proportions
of a
diamond
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Color:
(The color used in this
diagram is for
presentation purposes
and is not actual
color.)
Many experts name color
as the number one
consideration in
choosing a diamond. A
diamond's color is
graded on an
alphabetical scale from
D-Z, with D being
absolutely colorless and
Z being light yellow.
Beyond "Z", a diamond is
considered to be an
exotic or "Fancy" color.
DIAMOND COLOR SCALE
|
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
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Colorless |
Near
Colorless |
Faint Yellow |
Very Light
Yellow |
Light Yellow |
Since color differences
can be so subtle, they
are impossible to
determine by the
untrained eye. To grade
a diamond, gemologists
often place it on a
white background next to
another diamond that has
been previously graded.
If all other factors are
equal, the less color in
a diamond or the higher
color rating, the more
valuable a diamond
becomes. Likewise, as
the amount of color
increases, the price of
a diamond decreases
(though this does not
necessarily reduce the
beauty of a diamond.) |
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Clarity
All diamonds have
identifying
characteristics, but
most are invisible to
the naked eye. To view a
diamond, experts use a
10x magnifying loupe
which allows them to see
the appearance of tiny
crystals, feathers or
clouds. These natural
phenomena are called
inclusions. There are
five categories in class
that anyone interested
in purchasing a diamond
should be aware of when
grading clarity.
DIAMOND CLARITY SCALE
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FL |
IF |
VVS1 |
VVS2 |
VS1 |
VS2 |
SI1 |
SI2 |
I1 |
I2 |
I3 |
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Flawless-
Internally
Flawless |
Very Very
Slightly
Imperfect |
Very Slightly
Imperfect |
Slightly
Imperfect |
Imperfect |
FL
(Flawless) - IF
(Internally Flawless)
Flawless Diamonds reveal
no flaws on the surface
or internally are the
rarest and most
beautiful gems.
Internally Flawless
Diamonds reveal no
inclusions and only
insignificant blemishes
on the surface under 10x
magnification.
VVS1 - VVS2
(Very, Very Slightly
Included)
Very difficult to see
inclusions under 10x
magnification. These are
excellent quality
diamonds.
VS1 - VS2
(Very Slightly Included)
Only looking through a
10X loupe can pinpoint
the inclusions in this
category and are nearly
impossible to see with
the naked eye. These are
less expensive than the
VVS1 or VVS2 grades.
SI1 - SI3
(Slightly Included)
Diamonds with inclusions
easily identified under
10x magnification.
Finding flaws in this
category with the naked
eye is difficult. The
gems in this category
maintain their
integrity, depending on
the location of the
inclusions.
I1 - I3
(Included)
Diamonds with inclusions
which may or may not be
easily seen by the naked
eye. The flaws on the
stones in this category
will have some effect on
the brilliance of your
diamond. |
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Carat: (This diagram is
for presentation
purposes and is not to
scale)
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Carat is often
confused with
size even though
it is a measure
of weight. The
cut of a diamond
can make it
appear larger or
smaller than its
actual weight. |
One carat is the
equivalent of 200
milligrams. One carat
can be divided into 100
"points". A .75 carat
diamond is the same as
75 points or a 3/4 carat
diamond. Since larger
diamonds are rarer than
smaller diamonds, the
value rises
exponentially with carat
weight. |
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Cut
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Cut actually
refers to two
aspects of a
diamond. The
first is its
shape (round,
marquise, etc)
the second is
how well the
cutting has been
executed.
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A diamond's cut will
most certainly influence
its fire (the lovely
rainbow colors that
flash from within) and
brilliance (the
liveliness and sparkle),
as well as its perceived
size and even, to some
degree its apparent
color. Different cuts
reflect light in
different angles. A
diamond must be cut in a
geometrically precise
manner to maximize its
brilliance. |
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The
city is intersected by two rivers and
numerous tributaries: the
Humber River in the west end and the
Don River east of downtown at
opposite ends of the
Toronto Harbour. The harbour was
naturally created by sediment build-up
from lake currents that created the
Toronto Islands. The many creeks and
rivers cutting from north toward the
lake created large tracts of
densely-forested
ravines, and provide ideal sites for
parks and recreational trails. However,
the ravines also interfere with the
city's
grid plan, and this results in major
thoroughfares such as
Finch Avenue,
Leslie Street,
Lawrence Avenue, and
St. Clair Avenue terminating on one
side of ravines and continuing on the
other side. Other thoroughfares such as
the
Bloor Street Viaduct are required to
span above the ravines. These deep
ravines prove useful for draining the
city's vast storm sewer system during
heavy rains but some sections,
particularly near the Don River are
prone to sudden, heavy floods. Storage
tanks at waste treatment facilities will
often receive too much river discharge
causing them to overflow, allowing
untreated sewage to escape into Lake
Ontario closing local beaches for
swimming.