Is there a Fifth "C" to the criteria of a diamond?

This new grading catagory is being well accepted.

The diamond certificate is a complete evaluation of your diamond that has been performed by a qualified professional with the help of special gemological instruments.

Each stone bears its own recognizable, individual characteristics, which is listed on the certificate. A certificate is a "blueprint" of a diamond; it tells you the diamond's exact measurements and weight, as well as the details of its cut and quality.

 

 

Know your Diamonds

Various characteristics of diamonds are graded and categorized by the diamond industry.

Learning about diamonds is first learning about the "Four Cs" of diamonds which are considered the most important grades and categories: Below are the basic criteria jewelers use when grading diamonds, and they're the ones you'll need to understand to buy the right diamond for you.

Cut:Diamond cut is perhaps the most important of the four Cs, so it is important to understand how this quality affects the properties and values of a diamond. A good cut gives a diamond its brilliance, which is that brightness that seems to come from the very heart of a diamond.

Clarity: When we speak of a diamond's clarity, we are referring to the presence of identifying characteristics on (blemishes) and within (inclusions) the stone. If you think about the incredible amount of pressure it takes to create a diamond and the fact that natural diamonds are not grown in a sterile laboratory, it's no surprise that most diamonds have flaws.

Color: Colorless diamonds are the most desirable since they allow the most refraction of light (sparkle). Off white diamonds absorb light, inhibiting brilliance. When jewelers speak of a diamond's color, they are usually referring to the presence or absence of color in white diamonds. Color is a result of the composition of the diamond, and it never changes over time.

Carat Weight: Carat is a unit of measurement, it's the unit used to weigh a diamond. One carat is equal to 200 milligrams, or 0.2 grams. The word "carat" is taken from the carob seeds that people once used in ancient times to balance scales. So uniform in shape and weight are these little seeds that even today's sophisticated instruments cannot detect more than three one-thousandths of a difference between them. Don't confuse "carat" weight with "karat", the method of determining the purity of gold.

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