Marquise Diamond Tennis Necklace

Made to order — select your metal and necklace length above. The diamond count and price adjust with the length you choose. Want something custom?

Customize your jewelry here.

A marquise lab grown diamond necklace brings a sharp, graceful line of light around the neck, with each elongated stone angled to create movement instead of a flat row.

The all-diamond silhouette feels refined from a distance and intricate up close: 124 marquise diamonds at the modeled base length, prong-set in a continuous riviera design with a secure box clasp and figure-eight safety latch.

Choose 16, 18, 20 or 22 inches and your preferred metal; each necklace is made to order so the line is built to your length.

Design highlights

• Continuous marquise lab grown diamond riviera necklace
• 124 marquise diamonds at the modeled base length
• Approx. 18.60 ct total diamond weight at approx. 17 in
• Marquise diamonds measure approx. 5.50 × 3.00 mm each
• Prong-set line for open, high-sparkle brilliance
• Box clasp with figure-eight safety latch
• Available in 16, 18, 20 and 22 in lengths
• Made to order in 11 metal and color options

The signature is the angle: each marquise diamond points into the next, creating a feathered river of sparkle that feels fluid, elegant and unmistakably high-jewelry.

About Lab Grown Diamonds

A marquise diamond has a long, pointed outline that shows one of the largest face-up sizes per carat, giving this necklace an especially bold look for its weight.

Every Signora diamond is lab grown — chemically, physically and optically identical to a mined diamond and graded on the same 4C scale. The only difference is origin: grown, not mined, for a documented and mining-free choice.

Metal, Care & Fit

Sterling silver is bright and accessible. 9K, 14K and 18K gold rise in gold content, color richness and price; platinum is naturally white, dense and hypoallergenic. For fit, 16 in sits close to the collarbone, 18 in is the most versatile, and 20–22 in falls lower for a statement line. Clean with warm water, mild soap and a soft brush, then store flat and separate.

FAQ

What makes this marquise diamond necklace different from a round tennis necklace?
The marquise shape gives the line a longer, more directional sparkle. Instead of a simple row of round flashes, the angled marquise diamonds create a feathered, flowing pattern around the neck.

What length should I choose?
Choose 16 in for a collarbone fit, 18 in for the most versatile everyday length, and 20–22 in for a lower, more dramatic look. Because this is a continuous diamond line, the diamond count and total carat weight increase with the length.

How secure is the clasp?
The necklace is finished with a box clasp and figure-eight safety latch. That combination is commonly used on higher-carat tennis and riviera necklaces because it keeps the closure low-profile while adding extra security.

Are lab grown diamonds real diamonds?
Yes — lab grown diamonds are real diamonds with the same chemistry, hardness and sparkle as mined diamonds. They are graded on the same 4C scale and are not simulants.

Is this necklace good for a wedding or anniversary?
Yes — the all-diamond marquise line feels formal enough for bridal and evening wear, but the clean riviera silhouette also makes it a meaningful anniversary gift. It is a statement piece without needing a pendant or centerpiece.

Which metals can I choose?
You can choose Silver, 9K, 14K or 18K gold in yellow, white or rose, or Platinum. The necklace is made to order in the metal and length you select.