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For many people, a diamond is the largest purchase of their life. With that consideration, Blue Nile recognizes the importance of understanding exactly what you are buying. This guide simplifies the four Cs — cut, colour, clarity, and carat weight, as well as diamond shapes and certifications. After reading this guide, you will be better prepared to choose the diamond that is right for you.
Shape refers to the overall outline of the diamond when viewed from the top.
Clarity is graded based on the number, location, size, and type of inclusions.
The cut of a diamond determines its brilliance, dimensions, and finish.
Learn how to balance both size and quality when selecting a diamond.
Learn how to find a diamond with the right colour for your setting and budget.
Unbiased diamond grading reports are offered with every Blue Nile diamond.
Our quality standards are among the highest of all jewelers. 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 or AGSL, independent diamond grading labs with the most stringent grading scales of all labs.
Visit our recently purchased page and see the engagement rings and diamonds other customers have recently chosen.
Read how to keep your diamond sparkling, and securely set in your ring.
