The diamond tennis necklace has quietly become the most requested piece in fine jewelry this year. Once a red-carpet rarity, this continuous line of diamonds, known in the trade as a riviere, is now layered over slip dresses and white tees alike. In 2026 the tennis necklace is less occasion piece and more everyday signature.

Its appeal is partly mathematics. Lab-grown diamonds have made a full neckline of stones attainable for the first time, so the look that once belonged to royalty and Old Hollywood now sits within reach. The result is a trend with staying power, because a clean line of light never really goes out of style.

What Is a Diamond Tennis Necklace?

A diamond tennis necklace, also called a riviere, is a continuous line of individually set diamonds that wraps the neck in one unbroken ribbon of light. The two names describe the same jewel. Riviere is the traditional French term, meaning river of gems, while tennis necklace is the modern nickname, borrowed from the tennis bracelet after Chris Evert stopped a 1987 match to recover her fallen diamond line bracelet.

As jewelry historian Marion Fasel writes for the Natural Diamond Council, a diamond riviere “provides a radiance that is something akin to walking around with your own ring light, but far more magical.” That radiance, wrapped fully around the neck, is exactly what makes the piece feel modern again.

Why the Riviere Is 2026's Defining Necklace

The riviere is 2026's defining necklace because lab-grown diamonds made the continuous-line look attainable while A-list red carpets brought it roaring back. The global lab-grown diamond market is projected to reach 33.5 billion dollars in 2026, according to Fortune Business Insights, and lab-grown stones now account for more than 40 percent of United States diamond jewelry sales, per Statista.

The red carpet has done the rest. At the 2025 Met Gala, Anna Wintour wore an antique Victorian diamond riviere totaling 45 carats, as documented by the Natural Diamond Council, and stars from Angelina Jolie to Zoe Kravitz have layered one, two, even three at a time. Because lab-grown diamonds let shoppers achieve a large-diamond look at a fraction of the old cost, as reported by JCK, the trend has moved from the gala to the everyday.

How to Wear a Diamond Tennis Necklace

Wear a diamond tennis necklace solo as a modern choker, layered with a longer pendant, or dressed down with a white tee and denim. Once reserved for gowns, the riviere now reads effortless with daytime basics, which is the whole reason it has taken over.

• Solo and high on the throat, styled like a modern choker.
• Layered over a longer diamond pendant for depth and movement.
• Softened with a white tee and denim for daytime ease.
• Doubled or tripled for full red-carpet drama.

Build the Riviere Look with Roomy's

You can build the riviere look with pieces that share its continuous-diamond language, starting at the wrist and layering up to the neckline. Roomy's expresses the riviere first on the wrist. The Riviere Round Diamond Tennis Bracelet (from $1,600) is a single clean line of round brilliants, the same design idea that defines the necklace trend, and the Celeste Round Diamond Tennis Bracelet (from $1,700) offers a slightly fuller line. Stack either with a watch, or wear two together for the layered effect stylists love.

For the neckline itself, layer diamond pieces to echo the riviere's flow. The Ribbon & Baguette Diamond Statement Necklace (from $2,300) brings a sculptural diamond line to an open neckline, while the delicate Halo Round Diamond Pendant (from $850) and the Starlight Portal Diamond Necklace (from $1,700) layer cleanly underneath for depth. Because the look is all about a continuous line of stones, total carat weight is what drives both presence and price, and our diamond carat size guide explains how those numbers translate to what your eye actually sees. For the wrist version, see our diamond tennis bracelet guide, and our necklace layering guide shows how to stack the neckline. And if you prefer one stone to a full line, our diamond solitaire necklace guide covers the everyday icon that anchors any layered look.

Frequently Asked Questions