Tips on Buying Diamond
Diamonds are graded by four characteristics: cut, carat
(weight), clarity, and color. This is also known as the 4Cs.
All four of these properties determine how much a diamond is
brilliant diamonds are commonly cut with 58 facets. The better
proportioned these facets are on the diamond, the more light
will be reflected back to the viewer's eye. This is extremely
important as when cut properly, the diamond will sparkle more.
Diamond cuts are measured by the table percentage, so always
ask for it. A good table percentage is between 55-60%. Cut also
refers to the shape such as: round, pear, and oval.
If you are having a diamond mounted, write down the
measurements of your stone. Measurements never change. Measure
the stone after it is mounted and verify that it matches the
appraisal and/or certificate.
diamonds often cost more per carat due to their size. There are
100 points to a carat. Hence a 50 point diamond is 1/2 a carat.
(There are 5 carats to a gram.) Always get the actual point
size of a diamond rather than a fractional weight. Sometimes
jewelers will try to sell a .90 diamond as a 1 carat diamond. A
.90 diamond should be substantially less expensive.
Clarity ranges from flawless
(perfect) to I (included). Here is a chart:
inside and out
may have minor blemishes on the outside
VVS1, VVS2: have
very very small inclusions. VVS1 inclusions can only be seen
through the pavilion. VVS2 inclusions are more visible.
VS1, VS2: have very
small inclusions. VS1 inclusions are harder to see than
SI1, SI2, SI3: have
I1, I2, I3: have
inclusions visible to the naked eye
Diamond colors generally range from D - X for white and yellow
diamonds. D is the whitest. Around S they become "Fancy" yellow
Diamonds. One can also find green, pink, red, blue and brown
diamonds - though these are usually irradiated.
Source: : http://www.jewelrymall.com/diamond-guide.html