A carat is the gemologist's standard measure of
a diamond's weight. A carat is a term for weight, not size.
It is important to note that size alone is almost
meaningless unless you consider cut, clarity and
color. A large stone holds little value if it lacks
brilliance, purity and high-grade color. However,
size does increase the value of a good quality
diamond for the simple reason that large stones
are rarer than small ones.
Note: Use this chart as a relative
(Actual sizes will vary with different monitor
Once you've determined what cut, color, and clarity
grade you're looking for in a diamond, it's easy to decide
what carat weight of diamond you can fit within your
This chart illustrates the graduation of diamond sizes.
Note that a 2-carat diamond does not appear to be twice
the size of a 1-carat diamond when viewed from above.
Remember that since large pieces of diamond rough are
discovered less frequently than small ones, large
diamonds are generally more valuable. A two-carat
diamond of a given quality is always worth more than
two 1-carat diamonds of the same quality.
So that's it, now you are ready to go out and pick a
diamond that you're sweetie is sure to love!