The Diamond Guide

วันเสาร์ที่ 6 มิถุนายน พ.ศ. 2552

Colored Diamonds

Colored Diamonds
Fancy colored diamonds are all the rage
these days. Gemologists have developed
new ways to create versions that are
affordable for the average person - by
treating less desirable diamonds. These
less desirable diamonds are treated with
irradiation followed by intense heat. This
turns brown and yellowish diamonds into
beautifully colored diamonds that you can
afford. This produces stunning greens,
blues, yellows, reds, purples and other
colors. These colors are considered
permanent, but there is a possibility
they could change during repairs if a high
heat is used.

Treatments like irradiation make it possible
for more people to own these vividly colored
diamonds. Most natural colored diamonds
are rare and also extremely expensive. When
shopping for colored diamonds you need to
assume that any affordable fancy color
diamond has been treated. Ask about the
stones origin and request to view a lab
certificate to verify authenticity.

Synthetic colored diamonds are another
option if owning a colored diamond is
something you desire but cannot quite afford.
They are real diamonds, but they are created
in a lab.

Natural fancy color diamonds get their
coloring from different trace elements present
in the stones, such as nitrogen, which
produces a yellow diamond. Diamonds can
be colored by exposure to radiation during its
creation. An example of a diamond affected
by radiation is a Green diamond.

Another way that a natural colored diamond
gets color is by its inclusions. Regarded as
flaws and undesirable in a colorless diamond,
inclusions give unique tones and brilliant
flashes of color in a fancy color diamond.
Remember that Natural fancy colored
diamonds are very expensive, any colored
diamond labeled to be sold as natural should
be accompanied by a certificate from a
respected grading lab.

A "fancy" diamond is a natural diamond that
has color. These colors vary from red, green,
purple, violet, orange, blue and pink – and
most shades between. Fancy color shades
vary from faint to intense.

The most famous diamonds in the world are
Color diamonds. The Tiffany Diamond,
which is yellow and the Hope Diamond which
is blue are colored diamonds. Color
diamonds have an amazing financial track
record. The value has never decreased on
wholesale level in more than 30 years. Blue
and pink diamonds have doubled every 5
years of a strong economy. In the 1970’s
you could have bought a very high quality
blue diamond for about 50K and today the
very same stone would be worth between
2 and 3 million.

วันอังคารที่ 2 มิถุนายน พ.ศ. 2552

Selecting Diamonds

Diamonds are graded for certification by
laboratories using grading criteria. Four of
these criteria are critical to understand when
making a diamond purchase or investment.
Known as the “Four C’s” these criteria are:
color, cut, clarity and carat.

Color is the result of the composition of a
diamond and it does not change. When a
jeweler is describing the color of a diamond
they are referring to the presence or absence
of color in white diamonds. Because a
diamond with no color allows maximum light
to pass through, colorless diamonds are
preferred for their sparkle.

Cut refers to a diamonds reflective quality.
Most diamonds are cut with 58 facets. The
brilliance of diamonds is heavily dependent
on the cut. The different angles and the finish
of a diamond determine its ability to reflect
light and cause its brilliance and fire.
Remember that the cut of a diamond can
have an impact on its durability as well as its
beauty. Some cutting faults can make a
diamond prone to breakage. A diamond
that is cut too thin can also cause light to
leak out of the back and the diamond will
lose some of the sparkle and appear not
to shine. So, as you can see the Cut is
probably the most important of the Four C’s.

During the formation process, inner flaws, or
inclusions occur in most diamonds. The
number and size of these inclusions
determine what is referred to as the clarity
of a diamond. Diamonds that are clear
create more brilliance and therefore are rarer
and highly priced. To be considered
“flawless”, a diamond must have no surface
or internal imperfections visible upon being
viewed by a skilled diamond grader using
10 power magnifications.

Carat is the unit of weight by which diamonds
are measured. One carat is equal to 200
milligrams. A carat is divided into 100
segments called points. 150 points would
equal one and a half carats.

When you go to the store to make that all
important diamond purchase, do not be shy!
Ask questions, get the answers needed to
make an informed purchase. Shopping for
certified diamonds enables you to make an
informed selection. Knowing the “four C’s”
allows you to comparison shop and purchase
the best diamond at a fair price. But, before
making a purchase, shop around and decide
what shapes and styles really appeal to you.
Enjoy your diamond for years to come!

Are Diamonds Really Rare?

When you walk into a jewelry store and see
all the diamonds in all of the various settings
that are for sale, it is difficult to realize that
diamonds are indeed rare. Most people
don’t even stop to consider how that
diamond came to be sitting in that jeweler’s
case! There is quite a bit of work that is done
before a diamond is ready to sell to the
general public!

For every one million diamonds that are
mined, only one will be found that is a quality
one caret diamond. In order to find a two
caret diamond, about five million diamonds
must be mined. More than two hundred tons
of ore must be mined to find one small
diamond, and even then, more than 80%
of the diamonds that are mined are only
good for industrial use, such as diamond
drill bits.

So, the next time you visit your local jewelry
store, ask to see the one carat diamonds.
You should look at this diamond with new
appreciation – knowing that it truly is one
in a million!