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Eternity graduated diamond necklace in 18k white gold.

Diamond Necklaces

The eternal brilliance of a dazzling diamond necklace is unmatched. 
Explore diamond pendants, floating diamond necklaces, eternity necklaces 
and additional designs set in precious metals. Shop platinum and gold 
necklaces with diamonds of all shapes and sizes for a truly timeless 
piece of jewelry.

Build Your Own Diamond Pendant®

Blue Nile makes it easy to create your own diamond necklace.
A diamond being set into a solitaire pendant setting.
lab grown pendant necklace on cream fabric

A New Way to Sparkle

Lab grown diamonds offer an affordable alternative for sparkle—making brilliant style effortless.

Explore Lab Diamond Jewelry

We offer a leading selection of GIA graded lab grown diamonds fit for any jewelry style. Every stone is expertly crafted to bring endless brilliance.
Lab grown diamond pendant and studs

Only at Blue Nile

When it comes to celebrations we strive to make your experience as
brilliant as our jewelry with the perfect pieces for every occasion.

Meet our personal jewelers, explore bestselling styles, pick up an online order, arrange to preview something from our online collection and so much more.
Book a fun and interactive appointment with a diamond expert and get up-close views of diamond and jewelery options from the comfort of your own home.
Amazing Value
The highest-quality design at a great price.
Peace of Mind
30-day returns, diamond price-match guarantee and more.
Expert Guidance
The original online jeweler since 1999.
Inspiring Assortment
The perfect pieces for every occasion.

Top Questions and Answers About Diamond Necklaces

How much does a real diamond necklace cost?

While the price of a diamond necklace can range from a few hundred dollars to hundreds of thousands of dollars, you can find a gorgeous diamond necklace at any price point. A shimmering, single-diamond solitaire necklace is an affordable and beautiful piece of diamond jewelry, while an intricately adorned, diamond-encrusted eternity necklace will cost more.

The type of precious metal will also impact the cost of men’s and women’s diamond necklaces. A platinum custom pendant with diamonds will cost more than a similar design in white gold due to platinum’s higher value.

How much is a 1 carat diamond necklace worth?

The worth of a one carat diamond necklace is largely based on the stone itself. Diamonds are valued based on the 4Cs. The greater the clarity, cut, color and carat of the diamond, the higher the value of the necklace. Higher quality 1 carat diamond necklaces can fetch upwards of eight thousand dollars.

What is the best chain for a diamond pendant?

A sturdy chain is your best bet for a diamond pendant—but that doesn't mean it has to be big and heavy. Cable chains are a popular choice for their solid construction and delicate appearance, and they're simple to repair if they break, increasing their longevity.

How do you layer diamond necklaces?

There are many ways to layer this jewelry depending on the type of necklace you choose. Diamond pendants are often layered with simple precious metal chains for a textured look. If you’re layering diamond chains, consider mixing and matching with other diamond pendant necklaces or even lockets. There are no concrete rules for layering necklaces and you should create a layered look that best fits your personal style.

What should I look for when buying this kind of jewelry?

Whether you’re buying a simple diamond necklace with a solitaire pendant or you’re purchasing an eternity style with many gemstones, there are key features to keep in mind when shopping for a diamond necklace. You’ll want to understand the quality of your diamonds, especially their certifications and ratings. You should also make sure the gemstones are set in sturdy metals with secure clasps.

Purchase from jewelers you can trust and review the diamonds of the piece you’re buying. Larger gemstones should always come with certifications regarding their quality. We offer transparent information regarding our diamond necklaces including the gemstone quality for a worry-free shopping experience.

What are the metal options?

You can choose from platinum, rose gold, yellow gold or white gold diamond necklaces.

Are men’s and women’s diamond necklaces worth it?

Whether you’re purchasing pendant, eternity, bar or floating diamond styles, these necklaces offer lasting value and incredible sparkle. If you’re looking for a piece that can be worn daily with lasting shine and timeless brilliance, men’s and women’s diamond necklaces are a wonderful choice.

What do men’s styles look like?

Men’s diamond necklaces typically feature thicker chains and larger pendants. These styles also include diamond chains, with eternity and tennis styles that can be worn on their own or as part of a stacked look.

What sizes are available?

Our chain lengths for necklaces with diamonds range from 16” to over 36”. In terms of gemstone sizes, the pieces vary depending on the necklace type and custom options. Many people opt for 1 carat diamond necklaces in solitaire styles, but larger and smaller sizes are also available. Necklaces with multiple diamonds often feature pavé or smaller stones set in a specific shape or style.

How can I tell the diamonds are real?

Real diamonds will have an innate brilliance that shows sparkle in many types of lighting. The best way to ensure you’re purchasing real diamonds is to buy your necklace from a reputable jeweler.

Are lab-grown options available?

There are many options for lab-grown styles in diamond necklaces, including colored diamonds that are surprisingly affordable.

Do diamond chains and pendants make good gifts?

Timeless sparkle makes this jewelry the perfect gift for any occasion.

What is carat total weight?

Necklaces featuring pavé or smaller diamonds often represent their carat weight in carat total weight. This is represented by CT TW designations and it refers to the total carat weight of all the diamonds in a necklace rather than a single diamond's weight.