IN-HOUSE VERIFIED
No replicas, ever.
Every fancy-shaped diamond is examined under loupe and spectrometer by our team before listing. No re-sellers in our chain.
Browse Rolex inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Audemars Piguet inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Patek Philippe inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Richard Mille inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Cartier inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Avi & Co inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse F.P. Journe inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Omega inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Hublot inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Breitling inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Panerai inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Other Brands inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Avi’s Showcase inventory by collection. Pinned references below — search by reference number for the full catalogue.
Live Results
Start typing to search watches, jewellery and references.
Browse Rings inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Earrings inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Necklaces inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Pendants inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Bracelets inventory by collection. Pinned references below — search by reference number for the full catalogue.
Browse Collections inventory by collection. Pinned references below — search by reference number for the full catalogue.
Live Results
Start typing to search watches, jewellery and references.
COMPLIMENTARYWhite-glove insured delivery on every order
Taxes calculated at checkout
WHITE-GLOVE CONCIERGE
WHITE-GLOVE CONCIERGE
Need a moment? Schedule an appointment with a specialist.
Schedule appointment Schedule appointment



GIA report on file
✓ Free shipping within the continental U.S.
✓ Insured, hand-delivered by a brand specialist
BUILT FOR COLLECTORS
IN-HOUSE VERIFIED
Every fancy-shaped diamond is examined under loupe and spectrometer by our team before listing. No re-sellers in our chain.
TWO YEARS, ZERO QUESTIONS
Two-year guarantee on craftsmanship, setting and clasp. Annual courtesy cleaning included for life of the piece.
WHITE-GLOVE SERVICE
Insured shipping, in-home try-on, lifetime polish, resize and recertification — for the original owner and the next.
FREQUENTLY ASKED
When choosing a high-end diamond necklace, it is important to look for a trusted retailer with experience in the world of fine jewelry. Here at Diamonds by Avi & Co., we have decades of history working with luxury watches and elite diamond jewelry, which has helped us build an unmatched understanding of craftsmanship and style for all of our diamond pieces.
We also suggest prioritizing naturally mined diamonds and those that come with paperwork and GIA certification documents. Furthermore, it is best to purchase high-end diamond necklaces made from precious metals like 18K gold or platinum. Both of these factors will help your diamond necklace hold value over time, making it both a beautiful accessory and an investment.
The total carat weight of a diamond necklace is calculated by combining all of the respective diamond weights that are included in the necklace. A pendant necklace with one large diamond will have only one diamond weight to include. But a tennis necklace, which is set with numerous diamonds, will reach its total carat weight by adding all of the individual diamond weights together. For instance, a necklace with twenty 1-carat diamonds would have a total weight of 20 carats. Typically, higher carat weight leads to higher price points.
There are many different popular styles of luxury diamond necklaces that are suited to a variety of different occasions. The tennis necklace style, which is set with numerous diamonds of the same size around the entire length, is a timeless look suitable for everyday wear or formal events. A Riviera necklace is similar to a tennis necklace, but it features graduated sizes of stones that grow larger toward the middle of the necklace. Other popular styles include chokers, pectoral necklaces, and drop necklaces.
Choosing the best necklace style and length is a matter of personal preference. Those who prefer shorter necklaces may like styles like tennis necklaces, Riviera necklaces, pectoral necklaces, or choker necklaces. Those who prefer slightly longer necklaces or diamonds that sit lower on the neck area may prefer pendant or drop necklaces. Different styles may also have more or fewer diamonds, which can also impact wearability and suitability for different events.
The metal used in a luxury diamond necklace can impact the piece’s overall appearance, brilliance, and luminosity. We suggest choosing high-end diamond necklaces that use precious metals like 18K gold or platinum. Cheaper metals like bronze, copper, or nickel as well as gold-plated necklaces can irritate the skin and show more wear over time. Many buyers like the icy effect of white metals like white gold or platinum, which complement the sparkle and brilliance of classic white diamonds. Necklaces made from yellow gold or rose gold may add warmth and a vintage appeal, especially when paired with yellow diamonds or other stones.
A LEGACY OF LUXURY
As a family-owned business, we take great pride in delivering unparalleled customer service — expert guidance and personal attention through every jewelry, watch and one-of-a-kind selection. This commitment to excellence in craftsmanship and service is our reputation. Aspen | New York | Miami.