The 4Cs of Diamonds
This short tutorial explains the Four C's- cut, colour, clarity, and carat weight - the most important characteristics of buying a diamond.
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Diamond Education
Cut
The cut of a diamond determines its brilliance. Put simply, the better a diamond is cut, the more sparkle it will have.
Colour
A diamond's colour grade refers to the lack of colour. The more colourless the diamond, the higher quality grade it will receive.
Clarity
Almost all diamonds have tiny imperfections. Diamonds with few or no imperfections receive the highest clarity grades.
Carat
This is the term with which people are most familiar, but bear in mind that carat is specifically a measure of a diamond's weight.
Shape
Shape describes a diamond's form, mostly from a top view, and all shapes (round, princess, radiant, etc.) have different attributes.
Certification
Unbiased diamond grading reports are offered with every Blue Nile diamond.
Quality
For most people, buying a diamond is a new experience, but that doesn't mean it should be overwhelming. Understanding a diamond's quality characteristics is straightforward and simple.
Our quality standards are among the highest of all jewellers. As the largest online diamond retailer, Blue Nile offers the largest collection of the world's finest cut diamonds. Pre-selected for exceptional quality, the cut, colour, and clarity of our loose diamonds are evaluated based on a standardized grading scale. Also, each loose diamond is accompanied by a grading report from either GIA, AGSL, independent diamond grading labs with the most stringent grading scales of all labs.
What Are Other Customers Choosing?
Visit our recently purchased rings and see the engagement rings and diamonds other customers have recently chosen
Read our tips and hints for finding the perfect diamond.
Read how to keep your diamond sparkling, and securely set in your ring.