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The weight of a diamond is measured
and counted in carats. This metric system was adopted
at the start of the 20th century. Carat commercially abbreviated
to ct is divided into 100 points. A carat is also subdivided
into grains 1 carat equals 4 grains and a quarter carat
is 1 grain.
When you purchase a diamond
in a ring. The term 1-carat not only refers to a diamond
of exactly 1-carat but there are weight ranges that
have the same name. As you will see in the list below.
One carat (4 grainer)
= 95points to 105 points
Three quarter carat (3 grainer) = 70
points to 76 points
Half carat (2 grainer) = 47 points
to 56 points
Quarter carat (1 grainer) = 23 points
to 26 points
Diamonds are very often cut by weight
to gain the maximum weight and least loss from a rough
diamond. This affects the cut and fire from the stone.
A very thick girdle can add relatively a lot of weight
to a diamond. Unfortunately this also effects the fire,
as a lot of light will go out through the girdle. This
should always be checked as it does effect the stone
quite badly.
| This illustration shows
a perfect cut diamond |
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| This illustration shows
a perfect cut pavillion. |
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| This picture shows
a natural perfect rough diamond. |
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This
illustration shows how 2 diamonds are cut out
of a natural crystal with the least loss of weight.
The 2 diamonds will have a smaller mm size and
more weight will be in the bottom of the diamond.
These are not badly cut they are not the best
cuts. You will notice they are the same size.
Both diamonds would be say 90 points. |
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This
illustration shows how a 2 diamonds are cut or
the perfect cut and size but more weight is lost
in the cutting process. 1 diamond would be say
1 carat and the other would be a half carat. |
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