-
Scintillation or Sparkle - A measure of the light reflected
out by a diamond as it is viewed from different angles
which occurs when light bounces among the diamond facets
creating a really sparkling display
-
Lustre / luster - The brightness of an object that shines
with reflected light
-
Dispersion - Dispersion refers to the prism of light
refracted from within a cut and polished diamond and
relates to the sparkling colors that are emitted from
the stone as it is viewed from different angles
These
elements may be visible even in their rough state; but in
order to enhance these advantages the diamonds must be cut
and polished. A skilful diamond cutter, or lapidary, is
able to bring out all the brilliance of a diamond, whilst
concealing its imperfections, by choosing the most appropriate
cuts and the most appropriate proportions and symmetry.
Diamonds are
Forever...
An
Impartial Guide to Diamonds
Information about Proportion
The most important proportion is the ratio between the
depth of the stone and its diameter, ideally this should
be about 58%. Another proportion to be taken into account
is the ratio between the height of the crown and the
pavilion. Cuts with good proportions reflect more light
and appear to look better than other diamonds of higher
clarity and appears to look 2 or 3 grades higher than
the actual color. The quality is also dependent upon
the cutting skill on the diamond facets.
Facets produce the sparkle
Facets are the smooth surface areas of a stone which
have been cut, polished and positioned at different
angles which allow light to enter and reflect back from
the diamond. The depth and width and the uniformity
of the facets control the brilliance and the durability
of diamonds. The quality of the facets are the major
determining factor in enhancing the diamond's ability
to sparkle or reflect light and play a large part in
the resulting brilliance of the stone.
Diamond Facets
A Good Diamond Cut
What constitutes good diamond Cut? Good cuts are effected
by several different factors:
-
Proportion affects the cut - The diamond's width
and depth have a large impact on the brilliance
of the stone
Cuts which are too shallow appear lifeless as the
light travelling through the stone is lost out of
the bottom of the diamond
-
Cuts which are too deep will appear lifeless as
the light travelling through the stone is lost out
of the sides of the stone
-
Diamond Symmetry affects the cut and refers to the
alignment of the facets of a diamond (Diamond symmetry)
should be cut to achieve the best play of light
-
Diamond Polish affects the cut - the surface of
the facets should be smoothly polished to enable
light to pass through them
-
A misaligned, broken, chipped or missing culet is
a common problem
Fancy
Diamond Cuts
Fancy
cut diamonds include the Emerald, Marquise, Heart,
Oval, Pear and Princess cuts and shapes. A Fancy Cut is
a way of cutting a diamond to maximize the carat weight.
A rough diamond which might only yield a half carat in a
Brilliant Cut might yield another 50% if cut into one of
the above shapes. A Fancy Cut diamond allows the cutter
to use the best attributes of a rough diamond whilst eliminate
inclusions and blemishes.
Information
about the Shapes
Click
one of the following links for facts and information about
the art of diamond cutting and the following diamond shapes
and cuts:
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