Diamond Education

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.

Cut

The cut of a diamond determines its brilliance. Put simply, the better a diamond is cut, the more sparkle it will have.

Learn More About Cut

Colour

A diamond's colour grade refers to the lack of colour. The more colourless the diamond, the higher quality grade it will receive.

Learn More About Colour

Clarity

Almost all diamonds have tiny imperfections. Diamonds with few or no imperfections receive the highest clarity grades.

Learn More About Clarity

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.

Learn More About Carat

Shape

Shape describes a diamond's form, mostly from a top view, and all shapes (round, princess, radiant, etc.) have different attributes.

Learn More About Shape

Certification

Unbiased diamond grading reports are offered with every Blue Nile diamond.

Learn More About Certification

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.

Blue Nile Standards Chart

What Are Other Customers Choosing?

Visit our recently purchased rings and see the engagement rings and diamonds other customers have recently chosen

Petite Pavé Diamond Engagement Ring in Platinum (1/4 ct. tw.)

View Setting

SG$ 2,175.00

Cushion 1.85 ct. Diamond

Colour: GClarity: VS2Cut: Very Good

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SG$ 17,091.00

Blue Nile Studio Petite French Pavé Crown Diamond Engagement Ring in Platinum (1/3 ct. tw.)

View Setting

SG$ 3,630.00

Round 1.55 ct. Diamond

Colour: EClarity: IFCut: Ideal

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SG$ 31,558.00

Low Dome Comfort Fit Solitaire Engagement Ring in Platinum (2mm)

View Setting

SG$ 720.00

Round 1.37 ct. Diamond

Colour: HClarity: VS1Cut: Ideal

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SG$ 11,641.00

Petite Micropavé Diamond Engagement Ring in Platinum (1/10 ct. tw.)

View Setting

SG$ 1,725.00

Round 1.57 ct. Diamond

Colour: IClarity: VS1Cut: Ideal

Find Similar Diamonds

SG$ 11,947.00

FAQ

Find answers to frequently asked questions about diamonds.

See FAQ

Tips

Read our tips and hints for finding the perfect diamond.

View Diamond Tips

Care

Read how to keep your diamond sparkling, and securely set in your ring.

Learn About Diamond Care