Diamond Necklaces - Rosenberg Diamonds & Co.

A diamond necklace is the most visible piece in a jewelry wardrobe — it sits at the neckline, picks up every light source in the room, and reads at conversational distance in a way no ring or earring can. The Rosenberg Diamonds necklace collection covers three core formats: the riviera (a continuous line of graduated or uniform diamonds), the pendant (a single stone or cluster on a chain), and high-jewelry statement pieces built around fancy color centers or multi-stone arrangements.

Total weights range from under 2 carats for delicate everyday pendants to above 50 carats for full-length rivieras. Every diamond is GIA-graded individually; in a graduated line, the larger center stones carry their own grading reports and the side stones are matched by color and clarity in our New York atelier.

We work in platinum for white-diamond pieces (neutral, dense, hypoallergenic) and 18kt yellow gold for fancy color necklaces, where the metal’s warmth amplifies the saturation of the stones. Clasps are integrated into the design — never bulky add-ons — and chain lengths are made to order between 14 and 22 inches.

GIA-certified natural diamond necklaces — riviera lines, pendants, and statement pieces in platinum and 18kt gold.

Choosing a Diamond Necklace by Length and Setting

The single most underestimated decision in a diamond necklace is length. A 14-inch collar sits at the base of the throat — dramatic, ideal for high necklines or off-the-shoulder gowns. A 16-inch choker sits just above the collarbone, the most versatile length for everyday and evening. An 18-inch princess drops to the collarbone, the classic pendant length. A 20–24 inch matinée falls below the collarbone, flattering longer necks and crew necklines. Anything 30 inches or longer is an opera or rope, designed to wear long or doubled.

Setting matters almost as much. Prong-set diamonds in a riviera maximize sparkle and light return — each stone catches light independently. Bezel-set stones read as a continuous metallic line with diamond accents, more architectural and contemporary. Pavé chains substitute a continuous bead of small diamonds for a polished metal chain, dramatically increasing brilliance without a single dominant stone.

Frequently Asked Questions

How long should a diamond necklace be?

16 inches sits just above the collarbone and works under most necklines — the safest single length for everyday wear. 18 inches drops to the collarbone and is the classic pendant length. For a statement riviera, 16–17 inches is most flattering on average necks. We make every chain to order between 14 and 22 inches.

Are the diamonds in a riviera GIA certified?

Yes — every stone above 0.30 carats carries its own GIA report. In a graduated riviera, the larger center stones are individually graded and the side stones are matched to those grades by color (within one grade) and clarity in our atelier.

What is the total carat weight of a typical riviera?

Delicate uniform rivieras start around 4 total carats (roughly 0.10ct per stone). Graduated rivieras typically run 10–25 total carats, with centers between 0.50 and 2 carats and sides decreasing toward the clasp. Full-length statement pieces above 30 total carats are made on commission.

Can I have a diamond necklace remade or resized?

Yes. Existing rivieras can be shortened, lengthened, or reset with additional stones. We also remake heirloom pieces — pulling original diamonds, regrading where possible, and setting them in a contemporary design. Most remakes take 4–6 weeks.