Diamond Ratings

 


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We focus on facts to ensure you have the information to make the right choices when buying diamonds. Sit back and watch our videos or read our articles to get the whole story. Our impartial advice will help you make the right decision, because Diamonds are Forever...

Diamond Ratings
Diamond Ratings. Whoever would have believed that diamonds are so complicated? Diamond clarity ratings, rating scale, rating system, quality ratings, rating scales and charts and diamond color ratings. Taking the time to understand diamond ratings before purchasing will pay dividends. Diamond Ratings help buyers to assess a diamond's quality.  The quality of a piece of diamond jewelry is commonly assessed by the 4C 's  of diamonds which consist of:

    Carat Weight Cut Clarity Color & Fluorescence

Diamond Ratings - Scales, Systems and Charts
Diamond rating systems provide an excellent guide to the quality of diamonds. The numbers, sizes, colors, locations and visibility of any inclusions and / or blemishes in diamonds can also effect the grades, ratings and quality of diamonds. This page details the ratings systems and charts relating to diamond clarity, color grading and ratings for white or colorless diamonds, carat weight and a diamond fluorescence ratings and grading chart.

Ratings, Reports and Certificates
Many diamond rating reports provide facts and information relating to the quality of the diamond you have purchased and various ratings of the diamond. A typical diamond grading report details the quality elements of Carat Weight, Size, symmetry and proportions, Clarity Grade, Color Rating and Fluorescence. But having obtained a certificate would you understand the meaning of a rating or grading report which stated that the diamond was clarity VS2 and the color E with a faint level of fluorescence? All the diamond ratings and grading charts are detailed below to help you through the minefield of buying diamonds!

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The Diamond Clarity Ratings
An important factor in diamond ratings is the Clarity of a diamond which relates to exactly how clear a diamond is and describes the presence, or absence, of Diamond Inclusions (flaws) within the diamond and any blemishes on its surface. The numbers, sizes, colors, locations and visibility of any inclusions or blemishes can effect the clarity and ratings of a diamond. As the majority of inclusions cannot be seen by the naked eye they are located by a jeweller under a 10 power magnification and then graded and rated according to their clarity. Ratings systems have been developed to grade diamond clarity ranging from high quality, rare and expensive flawless to imperfect and cheap diamonds, as detailed on the following ratings chart:

 Ratings - Diamond Clarity Chart
Ratings AbbreviationRatings Descriptions Details of ClarityRatings, Cost & Quality
FFlawlessNo internal or external flaws

Very Rare and Expensive

IFInternally FlawlessNo internal flawsRare and Expensive
VVS1Very, Very Small Inclusions
Level 1
Very Difficult to see inclusions under 10x magnificationExpensive
VVS2Very, Very Small Inclusions
Level 2
Difficult to see inclusions under 10x magnificationLess Expensive
VSVery Small Inclusions

Inclusions are noticeable to a jeweller under 10x magnification

VS1Very Small Inclusions
Level 1

Inclusions are noticeable to a jeweller under 10x magnification

VS2Very Small Inclusions
Level 2

Inclusions are noticeable to a jeweller under 10x magnification

SISmall Inclusions

Inclusions are easily seen to a jeweller under 10x magnification

SI1Small Inclusions
Level 1

Inclusions are easily seen under 10x magnification but not visible to naked eye

SI2Small Inclusions
Level 2

Inclusions are easily seen under 10x magnification but not visible to naked eye

LILarge InclusionsInclusions are visible to naked eye but minimum loss of brilliance
LI1Large Inclusions
Level 1
Larger Inclusions visible to naked eye with small loss of brilliance
LI2Large Inclusions
Level 2
Larger Inclusions visible to naked eye with dulling of brilliance
LI3Large Inclusions
Level 3
Larger Inclusions visible to naked eye with brilliance diminishedCheapest
Ratings AbbreviationRatings Descriptions Details of ClarityRatings, Cost & Quality
 Ratings - Diamond Clarity Chart
 

Color, Fluorescence and Ratings
The Color ratings relate to rarity, value and quality of a diamond. The most popular color is white, or colorless, which are rated in the following categories: Colorless, Nearly colorless, Faintly tinted (usually yellow), Lightly tinted (usually yellow) and Tinted (usually yellow but may progress to brownish). The color scale ratings for colorless diamonds goes from 'D' (colorless) to 'Z' (dark yellow). For more facts and information check out the details contained in the following link: Diamond Color. The amount of yellowish color decreases the value of a "colorless" stone.
 

Diamond Color Scale or Ratings for
White or Colorless Diamonds
Color Diamond Color Scale Ratings
Colorless
D E F

Diamond Color Rating D
Color Rating E
Color Rating F


Most Expensive & Desirable

Near Colorless
G H I J
Color Rating G
Color Rating H
Color Rating I
Color Rating J

Faint Yellow
K L M
Color Rating K
Color Rating L
Color Rating M

Very Light Yellow
N O P R
Color Rating N
Color Rating O
Color Rating P
Color Rating R

Dark Yellow
S T U V W X Y Z
Color Rating S
Color Rating T
Color Rating U
Color Rating V
Color Rating W
Color Rating X
Color Rating Y
Color Rating Z

Cheapest & Least Desirable

Diamond Color Scale or Ratings for
White or Colorless Diamonds
Color Diamond Color Scale Ratings

 

 

 

Diamond Fluorescence Chart / Ratings
Many diamond ratings reports confirm whether or not a diamond fluoresces, and if it does, the level of the effect varying from none, faint, slight, moderate, strong or extreme. The strength of fluorescence in diamonds is described in the following ratings chart by specific abbreviations:

Diamond Fluorescence Ratings Chart
Ratings Levels
N, NO, NONNo Fluorescence
F, FB, FT, FAFaint or Faint Blue Fluorescence
SL, SLB, SLTSlight Fluorescence
M, MO, ME, MDMedium or Moderate Fluorescence
S, ST, STB, STGStrong Fluorescence
E, EX, EXB, EFExtreme Fluorescence 

The Carat Weight and Ratings
There are no actual ratings in relation to carat weight but the subject should be researched before purchasing a diamond because the price of a diamond does not increase in proportion to the weight of a diamond! The Carat Weight defines the weight, not the size, of a Diamond. The demand for a 1 carat diamond is very high and consequently, the price of a highest quality 1 carat  diamond will cost significantly more than an equivalent diamond quality weighing 0.95 carats. For additional facts and information about Carat Weight please click the following link:

Carat Weight

The Ratings of Diamonds
The Ratings of diamonds is influenced by the Cut, Clarity, Color and Fluorescence. Remember that "Power flows from he who knows" so check out all of the facts and information to understand the ratings of diamonds before you buy.

 

Diamonds - Precious - Stone - Guide - Ratings - Color - Facts - Information -Info
Jewelry - Jewellery - Cost - Settings - Shapes - Cut - Clarity
Fluorescence - Ratings - Carat Weight

Diamond Ratings

 

Information about Diamond Ratings

Discover some fascinating information about Diamond Ratings.

  • Facts and Information about Ratings
  • Guide to the Ratings of Diamonds
  • Facts and Information
  • Cut
  • Clarity Color and Fluorescence
  • Carat Weight
  • Ratings of Diamonds
  • Use of Diamond Ratings in jewelry

 
 

Diamond Ratings - Precious - Stone - Guide - Color - Facts - Information -Info - Jewelry - Dimond - Dimonds - Jewellery - Jewlery - Daimond - Daimonds - Jewelery - Jewellry - Properties - Quality - Settings - Shapes - Sizes - Structure - Jewel - Gem - Gemstone - Precious - Stone - Guide - Color - Facts - Information -Info - Jewelry - Dimond - Dimonds - Jewellery - Jewlery - Daimond - Daimonds - Jewelery - Jewellry - Properties - Quality - Settings - Shapes - Sizes - Structure - Jewel - Gem - Gemstone - Diamond Ratings - Written By Linda Alchin

June 2014 Siteseen Ltd

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