Diamonds - California State University, Fresno

Diamonds - California State University, Fresno

Diamond s The Four Cs Clarity Clarity describes the clearness or purity of a diamond. This is determined by the number, size, nature, and location of the internal (inclusions) and external (blemishes) imperfections. Clarity Scale Symbol

Meaning Definition F Flawless Free from all inclusions or blemishes. IF Internally Flawless No inclusions visible at 10x magnification. VVS1 Very Very Slightly Included #1 Inclusions that are extremely difficult to locate at 10x. VVS2 Very Very Slightly Included #2 Inclusions that are very difficult to locate at 10x. VS1

Very Slightly Included #1 Minor inclusions that are difficult to locate at 10x. VS2 Very Slightly Included #2 Minor inclusions that are somewhat difficult to locate at 10x. SI1 Slightly Included #1 Noticeable inclusions that are easy to locate at 10x. Sl2 Slightly Included #2 Noticeable inclusion that are very easy to locate at 10x. I1 Included #1 Obvious inclusions. Somewhat easy

to locate with the unaided eye. I2 Included #2 Obvious inclusions. Easy to locate with the unaided eye. I3 Included #3 Obvious inclusions. Very easy to locate with the unaided eye. Color Color describes the amount of color the diamond contains. This can range from colorless to yellow with slight tints of yellow, gray or brown. Colors can also range from intense yellow to

brown, blue, green, pink and red. These fancy colors are rare and therefore more valuable. Color Scale GIA Code Color D,E,F,G,H,I (White) J,K,L Colorless Near Colorless (White) M Faint Yellow N,O,P,Q,R Yellow

Very Light S,T,U,V,W,X,Y,Z Light Yellow Cut Cut refers to the proportions, finish, symmetry, and polish of the diamond. These factors determine the fire and brilliance of a diamond. Well cut diamonds sell at a premium and poorly cut diamonds sell at discounted prices. With the advent of technology, the cut of the diamond can be determined through the use of

the Dia-Mension system: a computerized system which takes accurate measurements and proportions of a diamond in seconds- in addition to the standard millimeter gauge. Cut (Continued) As an example a round brilliant cut, which has 58 facets, is shown to the left. Since the quality of the cut is directly responsible for the stone's beauty, the precision with which the facets are arranged is of prime importance. They determine the amount

of light reflected to the eye, called brilliance. Carat Carat is the unit of weight for the diamond. A carat is further subdivided in 100 points ( 0.01 carat = l point ). One carat is equal to 0.20 grams. Value per carat increases with carat size, because larger rough diamonds occur less frequently. In other words, 2 half-carat diamonds taken together will not cost as much as 1 onecarat diamond, as the onecarat stone is more rare.

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