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Basic Diamond Grading Information

Basic Diamond Grading Information

  

                        

 


                                   DIAMOND  SHAPES

                                                               

ROUND   PRINCESS   EMERALD  ASSCHER  MARQUISE   OVAL  RADIANT


                                                          


                            PEAR        HEART     CUSHION     BAGUETTE



DIAMOND CUTTING PROCESS
Not to be confused with the shape of a diamond, cut refers to the arrangement of a diamond’s facets. Cut is the most important of the 4C’s and is the only “C” under man’s control.

Using an exacting mathematical formula, master cutters create ideal cut diamond for 100% light refraction.

All light beams should be refracted up to the viewer's eye as shown in the 'ideal' sketch in the diagram as opposed to 'shallow' and 'deep' cut allowing light beams to travel out of the stone.

                             

The result: unparalleled beauty and grace, maximizing the coveted diamond characteristics of brilliance, scintillation and fire.



DIAMOND COLOR GRADING

Color is determined by viewing the body of the diamond from the side with the table down and proper lighting.
Pure colorless diamonds are classifies as "D" and the color scale ranges alphabetically from D-Z.
Diamonds range from colorless - the rarest and most valuable - to various degrees of yellow.

COLORLESS: D, E, F

NEAR COLORLESS: G, H, I, J

FAINT YELLOW: K, L, M

VERY LIGHT YELLOW: N, OP, QR

LIGHT YELLOW: ST, UV, WY, YZ

DIAMOND CLARITY GRADING

Clarity is the degree to which identifying characteristics known as inclusions are present in a diamond.


FLAWLESS; Internal Flawless No inclusions visible under 10x magnification


VVS, VVS1, VVS2: Very Very Slight Inclusion Inclusions are minute, extremely difficult to locate under 10x magnification


VS, VS1, VS2: Very Slight Inclusion Inclusions are minor, difficult to locate under 10x magnification


SI, SI1, SI2: Slight Inclusion Inclusions are noticeable, relatively easy to locate under 10x magnification


I, I1, I2, I3: Imperfect Inclusions are visible to the unaided eye


CARAT-WEIGHT
Carat weight is a standard unit of weight used for gemstones. A diamond s weight is the easiest of the 4C's to measure.

One carat is equal to 200 milligrams. Carat weight can be expressed as a decimal, fraction, or in "points." There are 100 points in a carat. A 50-point diamond is 1/2 a Carat.

Jewelry made by Deleuse has ideal cut diamonds, VS, E-G range. 

Deleuse Jewelers stocks new diamonds and jewelry with full insurance that the diamonds we sell are conflict free.

Contact Jeff Deleuse, Graduate Gemologist, for more information.

415-459-3739 deleuse@deleusejewelers.com.   deleusejewelers@gmail.com
Partial information credit to Lazare Kaplan Diamonds

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