Diamond Guides

We break down the absolute basics of diamonds so you can choose your perfect stone with total confidence.

Jewelers tweezers holding a loose diamond with diamonds scattered

The 4 Cs of a Diamond

Discover the 4 Cs and learn all about how they contribute to the look and price of diamonds.

Comparing two diamond engagement rings

Diamond Carat

The unique unit of weight measurement used to weigh gems and diamonds is referred to as carat

White and yellow diamond diamond engagement rings from KAY

Diamond Cut

Of the 4Cs, a diamond's cut has the greatest influence on how a diamond reflects, making it arguably the most important

Rough diamonds of various colors

Diamond Color

When talking about a diamond’s color, we’re referring to its natural body color – not the spectrum of light it reflects.

Scattered diamonds of varying clarity

Diamond Clarity

Clarity is the degree to which a diamond is free from flaws, which can hinder light as it passes through your diamond.

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Lab-Grown or Natural Diamonds?

Learn what sets lab-grown and natural diamonds apart to decide the best option for you.

Yellow gold and diamond necklaces from KAY

The KAY Diamond Promise

All of our products are responsibly sourced, and we use our scale for good to advance human rights while preserving our planet.

White and yellow gold diamond engagement rings from KAY

Diamond Jewelry Upgrades

Upgrading your diamond is the perfect way to celebrate an anniversary or mark a major milestone.

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The Diamond Shape Guide

Discover the unique characteristics of each diamond shape.

Various diamond jewelry from KAY

Education Hub

White gold and yellow gold engagement rings from KAY

Engagement Ring Guide

Diamond and gemstone necklaces from KAY

Jewelry Guide

Heart necklace and watch from KAY

Wedding & Anniversary Guides