Acquiring knowledge of the 4 Cs is crucial for any diamond
Carat weight : Carat weight is the weight of the diamond measured in carats. One carat is divided into 100 "points," so that a diamond of75 points weighs 0.75 carats. Carat weight is the most obvious factor in determining the value of a diamond. But two diamonds of equal carat weights can have very different prices, depending on their quality. Diamonds of high quality can be found in all size ranges.
Clarity: Diamond Clarity is a
measure of a diamond's internal flaws and impurities. A diamond that is
virtually free of interior or exterior inclusions (commonly referred to as
flaws) is of the highest quality, for nothing interferes with the passage of
light through the diamond. To determine a diamond's clarity, it is viewed under
10 x magnifications by a trained gemologist. Small inclusions neither mar its
beauty nor endanger its durability.
Color: The diamond color grading scale varies from totally
colorless to light yellow. The differences between one diamond color grade and
another are very subtle and difficult to distinguish.
D-F: Colorless: perfect or almost perfect color.
G-J: Near colorless: good to very good color and this diamond may “face up" colorless when mounted, especially in white gold or platinum.
K-M: Light but noticeable yellow or brown tint.
Cut (not shape): Many people confuse diamond cut with the shape of a diamond. Unlike shape, diamond cut is the metric used to evaluate the precision and quality of the overall cutting itself. Diamond cut is the most complex of the 4 Cs, and not even the major labs agree on how to best measure the quality of a diamond’s cut. Diamond Cut usually takes into consideration 3 criteria: Proportions, Symmetry and Polish. Sometimes Light Performance or other tests can be used to also calculate the precision of the diamond cut.
Other advanced characteristics of
diamonds include diamond Fluorescence and diamond Enhancements.
Fluorescence: as a term means that a diamond will glow (in blue) under a UV lamp when illuminated.
Enhancements : Please Refer section Treatment on
By understanding each diamond characteristic and knowing which questions to ask when purchasing a diamond, you are much more empowered when it comes time to make your diamond investment.
Fancy Color Diamond
Once owned only by royalty, "fancy" diamonds have gone democratic this century, thanks to increased production in Australia, Brazil,Venezuela and parts of Africa where conditions are right for natural color. By curious flukes of nature, some very rare diamonds are born the colors of a rainbow. These are the diamonds for customers who have everything else, those who covet a jewel few others can own.
Their popularity and beauty also have spawned color-induced diamonds and synthetic colored diamonds. These are less expensive, of course, and further expand consumers' horizons in the diamond world.
A "fancy" diamond is a natural diamond of color – such as red,green, purple, violet, orange, blue and pink – and should not be confused with a "fancy cut," which refers to shape. Fancy colors vary from faint to intense.
diamond that falls between K and Z on the Gemological Institute of America's
color grading scale can contain small amounts of yellow but not be considered
fancy. Any yellow diamond beyond Z is a fancy color and, as such, commands a
Causes of color – yellow and otherwise – are not as cut and dried as you might think. Infinitesimal impurities, irradiation or anomalies in crystal growth – or combinations of these factors – are the known causes of color. Here are a closer look at each one.