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Antique Onyx Necklace

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18k Vintage Nouvelle Bague Onyx Necklace
Located in New York, NY
This 18k Vintage Nouvelle Bague Onyx Necklace is an exquisite piece of luxury that exudes
Category

Early 20th Century Art Nouveau Antique Onyx Necklace

Materials

18k Gold, White Gold

5.46 Carat Pear Emerald Diamond Pearl Onyx Pendant Necklace
Located in Stamford, CT
Platinum emerald, diamond, pearl and onyx necklace. Pear shaped double cabochon green emerald is
Category

Early 20th Century Antique Onyx Necklace

Materials

Onyx, Pearl, Diamond, Emerald, Gold, 14k Gold, Yellow Gold

Rock Crystal & Onyx Pendant Necklace
Located in New York, NY
Rock Crystal & Onyx Pendant Necklace A carved rock crystal pendant with angle motif surrounded by
Category

1920s Unknown Art Deco Antique Onyx Necklace

Materials

Onyx, Crystal, White Gold, 14k Gold

Victorian 18k Onyx Gold Ball Festoon Necklace
Located in Narberth, PA
gold chain. At the center of the necklace are 22 teardrop shaped onyx stones, each of which hang from
Category

Late 19th Century Unknown Victorian Antique Onyx Necklace

Materials

Onyx, Gold, 18k Gold

Onyx & Diamond Cocktail Necklace 18kt Yellow Gold Unique Statement Necklace
Located in Jupiter, FL
Evening cocktail necklace made with natural onyx and diamonds, completed in 18KT yellow gold
Category

18th Century Unknown Early Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, 18k Gold, Yellow Gold

Art Deco Onyx and Marcasite Necklace or Brooch
Located in Stamford, CT
An attractive necklace from the Art Deco Era shows the geometry typical of the period. It was made
Category

1920s German Art Deco Antique Onyx Necklace

Materials

Onyx, Sterling Silver

Antique Art Deco Onyx and Marcasite Necklace or Brooch
Art Deco Onyx and Marcasite Necklace or Brooch
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W 0.88 in L 2.32 in
Victorian Oval Onyx Pearl Emerald Mourning Pendant Necklace
Located in Arnhem, NL
A Victorian antique 14 karat oval onyx pendant with a floral decoration assembled of pearls
Category

Early 20th Century Dutch Victorian Antique Onyx Necklace

Materials

Emerald, Onyx, Pearl, 14k Gold

Antique Victorian Oval Onyx Pearl Emerald Mourning Pendant Necklace
Victorian Oval Onyx Pearl Emerald Mourning Pendant Necklace
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W 1.58 in D 0.06 in L 1.78 in
Art Deco aquamarine, diamond and onyx pendant necklace
Located in Malmö, SE
Immerse yourself in our drop of seawater. Aquamarine & Diamond and onyx pendant. Height of Aqua
Category

Early 20th Century European Art Deco Antique Onyx Necklace

Materials

Aquamarine, Diamond, Onyx

Victorian Black Onyx Rose Gold Bead Court Necklace
Located in Lexington, KY
This necklace is THE necklace of all time!! It is an original Victorian piece in excellent
Category

1880s Victorian Antique Onyx Necklace

Materials

Onyx, Gold, Rose Gold, Yellow Gold

Enamel Onyx 14 Karat Yellow Gold Link Necklace
Located in Marcianise, IT
jewels with a vintage flavor. Necklace also suitable for those who love to collect vintage images. open
Category

1890s Italian Retro Antique Onyx Necklace

Materials

Onyx, 14k Gold, Yellow Gold, Enamel

Antique Art Deco Silver Onyx Beads Ornamental Link Necklace
Located in Munich, Bavaria
This striking Art Deco link necklace is made out of fourteen cast silver elements with a cut out
Category

1920s Art Deco Antique Onyx Necklace

Materials

Onyx, Silver

Art Deco Pearl, Onyx and Jade Pendant Necklace
Located in New York, NY
Features a hand-carved jade pendant set in an onyx and diamond surround. Suspended on a beautiful
Category

1920s Art Deco Antique Onyx Necklace

Materials

Jade, Onyx, Pearl, White Gold

ART-DECO Platinum necklace set with onyx and diamonds
Located in The Hague, ZH
ART-DECO Platinum necklace set with onyx and old mine cut, rose cut and single cut diamonds. 0.45ct
Category

1910s Dutch Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Platinum

ART-DECO Platinum necklace set with onyx and diamonds
ART-DECO Platinum necklace set with onyx and diamonds
No Reserve
H 3.15 in W 1.5 in L 16.54 in
Art Deco 30 Carat Amethyst Onyx and Pearl Necklace
Located in Santa Barbara, CA
This stunning Art Deco necklace boasts the iconic style of the Jazz Age. Centered by a dazzling
Category

1920s Art Deco Antique Onyx Necklace

Materials

Amethyst, Onyx, Pearl, 18k Gold, White Gold

Coral Onyx Diamonds 14 Karat Yellow Gold Pendant Necklace
Located in Marcianise, IT
grace. The cameo is set against a sleek, round onyx plate, providing a striking contrast that highlights
Category

Early 1900s Italian Artisan Antique Onyx Necklace

Materials

Coral, Diamond, Onyx, Gold, 14k Gold, Yellow Gold

Necklace and pendant set with onyx and diamonds 835 silver
Located in The Hague, ZH
Silver necklace and pendant set with onyx, old mine cut and rose cut diamond. 0.25ct - 40cm long
Category

1910s Dutch Art Nouveau Antique Onyx Necklace

Materials

Diamond, Onyx, Silver

Necklace and pendant set with onyx and diamonds 835 silver
Necklace and pendant set with onyx and diamonds 835 silver
No Reserve
H 1.5 in W 1.23 in L 15.75 in
Onyx & Diamond cocktail necklace 18KT yellow gold 15" chocker
Located in Jupiter, FL
Evening cocktail necklace made with natural onyx and diamonds, completed in 18KT yellow gold
Category

18th Century Unknown Early Victorian Antique Onyx Necklace

Materials

Onyx, Diamond, Yellow Gold, 18k Gold

Antique Deco Aquamarine Diamond Onyx Pearl Gold Pendant Necklace
Located in Miami, FL
Aquamarine & the black from the Onyx gemstones. this piece is formed by 2 mm cream tone Seed pearls
Category

1920s American Art Deco Antique Onyx Necklace

Materials

Aquamarine, Diamond, Onyx, Pearl, Gold

14 Karat White Gold Art Deco Onyx Diamond Pendant Necklace
Located in Wallkill, NY
An exquisite 14K white gold Art Deco pendant necklace features a lovely black onyx set with an
Category

1920s Art Deco Antique Onyx Necklace

Materials

Onyx, White Gold, 14k Gold

Antique Silver, Rock Crystal and Onyx Choker Necklace Made Year 1890
Located in Stockholm, SE
This sterling silver choker necklace is adorned with oval onyx stones and round rock crystals which
Category

1890s Swedish Antique Onyx Necklace

Materials

Onyx, Rock Crystal, Silver

Art Deco Black Onyx Marcasite Necklace Sterling Silver Bow Motif Antique
Located in New York, NY
THIS IS A STUNNING ORIGINAL ANTIQUE ART DECO BLACK ONYX MARCASITE NECKLACE OF THE FINEST QUALITY
Category

Early 20th Century Unknown Art Deco Antique Onyx Necklace

Materials

Marcasite, Onyx, Sterling Silver

Victorian Onyx Pearl Necklace Double Pendant 14K Gold Antique Original 1890s
Located in Dearborn, MI
Genuine Original Antique from 1890's Vintage Victorian Onyx Pearl Necklace Double Pendant 14K
Category

1890s Victorian Antique Onyx Necklace

Materials

Onyx, Pearl, 14k Gold, Yellow Gold

Art Deco Old European Cut Diamond & Onyx Pendant Necklace in Platinum
Located in Boston, MA
An Art Deco period diamond and onyx journey style target necklace in platinum. Centered by three
Category

Early 20th Century Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Platinum

Art Deco Carved Tourmaline Natural Pearl Onyx Diamond Sautoir Necklace
Located in New York, NY
the "Mother and Child", embellished by an onyx and diamond frame, additionally suspending a detachable
Category

1920s Art Deco Antique Onyx Necklace

Materials

Natural Pearl, Onyx, Tourmaline, White Diamond, Platinum

200.00 Carats Natural Carved Aqua Onyx Two Strand Art Deco Necklace
Located in Stamford, CT
English hand carved 1920's Art Deco genuine natural untreated Aqua and Onyx two strand necklace
Category

Early 20th Century Antique Onyx Necklace

Materials

Aquamarine, Onyx, 9k Gold

Pietra Dura Green Gold Stone Inlay Onyx Pearl Pendant
Located in Stamford, CT
Authentic late 1800's Pietra Dura Onyx with original natural gemstone inlay. Double natural pearl
Category

Late 19th Century Victorian Antique Onyx Necklace

Materials

Coral, Natural Pearl, Onyx, 14k Gold

Antique Art Deco 14k Yellow Gold Diamond & Black Onyx Filigree Pendant Necklace
Located in Montclair, NJ
Very Rare to find these necklaces in yellow gold! Most were made in white and platinum. The yellow
Category

1920s Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Yellow Gold

Platinum 18 Karat Gold Diamond Onyx Enamel Art Deco Pendant Necklace
Located in Zurich, CH
Striking historical Art Déco pendant necklace with diamonds, onyx and black enamel. Delicately
Category

1920s Dutch Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Gold, Platinum, Enamel, 18k Gold, White Gold

Cartier Art Deco Jade, Coral, Onyx and Platinum Diamond Sautoir Necklace
By Cartier
Located in New York, NY
American family's collection. The necklace composed of coral, black onyx and jade beads, joined by
Category

1920s American Art Deco Antique Onyx Necklace

Materials

Coral, Diamond, Jade, Onyx, Platinum

Art Deco 1.65 Carat Diamond and Onyx Drop Pendant Necklace, circa 1920s
Located in London, GB
This beautiful necklace dates back to the 1920s and features a 1.65 carat diamond. It is an old cut
Category

1920s Unknown Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Platinum

19th Century Antique Onyx Pendant, Enhancer 14k Gold with Floral Gold Appliqués
Located in Berlin, DE
Antique, diamond-shaped onyx pendant. 14k yellow gold. With secret compartment to store small
Category

19th Century Antique Onyx Necklace

Materials

Onyx, 14k Gold, Yellow Gold

Victorian Black Onyx 14k Gold Locket Necklace Flower Motif Pearl, Circa 1860
Located in New York, NY
A magnificent Victorian - Belle Epoque Picture locket pendant necklace in Black Onyx, and 14 Karat
Category

Mid-19th Century Unknown Victorian Antique Onyx Necklace

Materials

Onyx, Pearl, 14k Gold, Yellow Gold, Gold

Art Deco Platinum, Diamond, Onyx and Natural Pearl Pendant Necklace, C. 1920
Located in Aspen, CO
Art Deco Platinum, Diamond, Onyx and Natural Pearl Pendant Necklace, c. 1920. The fancy cut onyx
Category

Early 20th Century Unknown Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Natural Pearl, Platinum

Art Deco 1925 Long Sautoir Stations Necklace In Platinum With Pearls And Onyxes
Located in Miami, FL
Art deco long sautoir necklace. A beautiful long necklace sautoir, created in America during the
Category

1920s American Art Deco Antique Onyx Necklace

Materials

Onyx, Pearl, Natural Pearl, Platinum

Victorian Black Onyx Pearl Locket Necklace Flower Motif 14K Braided Hair Antique
Located in New York, NY
This is a magnificent Victorian - Belle Epoque Picture locket pendant necklace in Black Onyx, and
Category

Mid-19th Century Unknown Victorian Antique Onyx Necklace

Materials

Onyx, Pearl, Gold, Yellow Gold, 14k Gold

Art Deco Onyx and Coral Necklace with Diamond Accent in Platinum and Gold
Located in New York, NY
An Art Deco coral, onyx, diamond, and platinum necklace, comprised of an onyx lozenge centered by a
Category

1920s Art Deco Antique Onyx Necklace

Materials

Coral, Diamond, Onyx, Gold, 18k Gold, Platinum

Victorian 18kt/Sterling, Diamond + Onyx Day-to-Night Earrings/Locket Pendant Set
Located in Narberth, PA
yellow gold and topped in sterling silver, this set is comprised of incredible Pear-shaped onyx cabochon
Category

1880s French Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, 18k Gold, Sterling Silver

Art Deco 18 Karat Gold 0.40 Carat Diamond Onyx Pearl Drop Pendant Necklace
Located in Vilnius, LT
This is an Art Deco drop pendant necklace crafted in 18K white gold. Circa 1940. The piece
Category

Early 20th Century Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Pearl, Gold, 18k Gold

Victorian 2.60 Ct Old Diamond Pearl Forget Me Not Onyx 18 KT Necklace
Located in Napoli, IT
Black Onyx including the bail, loaded with Diamonds,mounted in solid 18 KT gold with silver portions for
Category

1880s European Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, Pearl, 18k Gold

Antique Onyx Diamond Mourning Pendant
Located in The Hague, ZH
Antique Edwardian mourning pendant Crafted from onyx, set on 835 silver. With old European cut
Category

19th Century Unknown Edwardian Antique Onyx Necklace

Materials

Diamond, Onyx, Silver

Antique Onyx Diamond Mourning Pendant
Antique Onyx Diamond Mourning Pendant
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H 2.37 in W 1.46 in
Platinum Black Onyx & Diamond Pendant
Located in Big Bend, WI
Platinum black onyx and diamond pendant with 14K white gold fancy Deco link chain. The center
Category

Early 1900s Unknown Antique Onyx Necklace

Materials

Diamond, Onyx, 14k Gold, White Gold, Platinum

Platinum Black Onyx & Diamond Pendant
Platinum Black Onyx & Diamond Pendant
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W 0.63 in L 1.5 in
Lovely Victorian Onyx Tear Drop Collar
Located in Riverdale, NY
Lovely and elegant Victorian Onyx Tear Drop Collar from the late 19th Century. Lovely graduated
Category

1870s British Victorian Antique Onyx Necklace

Materials

Onyx, 18k Gold

Lovely Victorian Onyx Tear Drop Collar
Lovely Victorian Onyx Tear Drop Collar
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W 1.5 in L 14.5 in
Lovely Victorian Onyx Tear Drop Collar
Located in New York, NY
Lovely and elegant Victorian Onyx Tear Drop Collar from the late 19th Century. Lovely graduated
Category

1860s British Victorian Antique Onyx Necklace

Materials

Onyx, 18k Gold

Lovely Victorian Onyx Tear Drop Collar
Lovely Victorian Onyx Tear Drop Collar
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W 1.5 in L 14.5 in
Art Deco Onyx Diamond Platinum Geometrical Set
Located in New York, NY
sustaining the necklace also in onyx and diamond (mounted on platinum); the geometrical patterns evoking a
Category

1920s Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Platinum

Art Deco Marcasite and Onyx Pendant
Located in New York, NY
Art Deco Marcasite and Onyx Pendant from the 1920's set in sterling. Carved oval onyx is set within
Category

1920s American Art Deco Antique Onyx Necklace

Materials

Marcasite, Onyx, Silver, Sterling Silver

Antique Onyx, Diamond & Opal Mourning Locket
Located in London, GB
eight mine cut natural diamonds (approx 1.5-1.75mm each) Crafted from Black onyx stone - set with a
Category

Early 1900s Unknown Edwardian Antique Onyx Necklace

Materials

Diamond, Onyx, Opal, 18k Gold

Antique Onyx, Diamond & Opal Mourning Locket
Antique Onyx, Diamond & Opal Mourning Locket
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W 1.97 in D 0.18 in L 2.76 in
Antique Victorian Black Onyx and Diamond Locket
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive antique black onyx and 0.23 carat diamond, 18 karat white and
Category

1880s Unknown Antique Onyx Necklace

Materials

Diamond, Onyx, 18k Gold, Yellow Gold

Antique Victorian Black Onyx and Diamond Locket
Antique Victorian Black Onyx and Diamond Locket
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W 1.32 in L 1.73 in
Victorian Onyx and Seed Pearl Locket
Located in New York, NY
Victorian onyx, gold and seed pearl locket pendant circa 1880's. Lovely buckle motif with photo
Category

Late 19th Century American Victorian Antique Onyx Necklace

Materials

Natural Pearl, Onyx, 14k Gold

Victorian Black Onyx and Diamond Mourning Brooch
Located in London, GB
detail around the edges, a black onyx face with a star set old cut diamond. Like most mourning jewellery
Category

19th Century Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, Gold, Yellow Gold

18 Karat Gold Pearl and Onyx Cross Pendant
Located in Palm Springs, CA
Italian onyx cross pendant with 18 karat gold harness and pearls / Made in Italy 1870s-1890s
Category

Late 19th Century Italian Antique Onyx Necklace

Materials

Onyx, Pearl, 18k Gold

18 Karat Gold Pearl and Onyx Cross Pendant
18 Karat Gold Pearl and Onyx Cross Pendant
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H 3.47 in W 1.58 in
Victorian 14kt/Sterling Onyx Locket with Diamond Starburst Locket Pendant 0.80ct
Located in Narberth, PA
in solid onyx which is carved into a substantial oval-shaped plaque. Riveted into the center is a
Category

Early 1900s Unknown Late Victorian Antique Onyx Necklace

Materials

Diamond, 14k Gold, Sterling Silver

Dimos 18k Gold Black Onyx Carved Sphinx
Located in Athens, GR
Museum replica pendant in 18 karat yellow gold completely handmade set with black Onyx hand carved
Category

15th Century and Earlier Greek Greek Revival Antique Onyx Necklace

Materials

Onyx, 18k Gold

Dimos 18k Gold Black Onyx Carved Sphinx
Dimos 18k Gold Black Onyx Carved Sphinx
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H 1.378 in W 0.748 in
Antique 1875 Onyx Amethyst Silver Glas Locket Pendant
Located in Munich, Bavaria
This elegant and onyx locket is decorated with an amethyst mounted in a finely engraved silver
Category

1870s Victorian Antique Onyx Necklace

Materials

Amethyst, Onyx, Silver

Antique 1875 Onyx Amethyst Silver Glas Locket Pendant
Antique 1875 Onyx Amethyst Silver Glas Locket Pendant
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W 1.23 in D 0.16 in L 2.45 in
Antique, Large Onyx Gold Pendant, Enhancer with Black Enamel
Located in Berlin, DE
Antique, historical, large onyx gold pendant. The pendant can also be converted into a brooch
Category

19th Century Victorian Antique Onyx Necklace

Materials

Onyx, Gold, Enamel

Antique Onyx Rose Cut Diamond Gold Initial Locket
Located in Danvers, MA
This superb Victorian period locket is carved from a solid piece of glossy black onyx with an
Category

19th Century European Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, Gold, Silver

Antique Victorian Diamond and Onyx Locket Pendant
Located in Rotterdam, NL
An antique Late Victorian, 1880-1890, diamond and onyx locket pendant. In the center, the onyx
Category

Late 19th Century Dutch Victorian Antique Onyx Necklace

Materials

Diamond, Onyx, 14k Gold, Yellow Gold, Silver, Gold

18 Karat Gold Pearl and Onyx Photo-holder Pendant
Located in Palm Springs, CA
Italian onyx photo-holder pendant with 18 karat gold fittings and pearls (faith-hope-charity
Category

Late 19th Century Italian Antique Onyx Necklace

Materials

Onyx, Pearl, 18k Gold

Art Deco Green Onyx and Marcasite Pendant, Wachenheimer
Located in New York, NY
Art Deco Green Onyx and Marcasite Pendant set in sterling by Wachenheimer, Germany. Fancy cut
Category

1920s German Art Deco Antique Onyx Necklace

Materials

Marcasite, Onyx, Sterling Silver

1920s Art Deco Onyx Pearl Diamond Platinum Pendant
Located in Berlin, DE
diamonds circa 1,54 ct., onyx and pearls. Mounted in platinum. Chain in 14K white gold. Total weight 8,84 g
Category

Early 20th Century Art Deco Antique Onyx Necklace

Materials

Diamond, Onyx, Cultured Pearl, 14k Gold, Platinum

Victorian Onyx & Seed Pearl Mourning Jewelry 3-Piece Suite
Located in METAIRIE, LA
gun. Each containing Oval Slab cut pieces of Natural Black Onyx Accented with Natural Seed Pearls
Category

1890s Victorian Antique Onyx Necklace

Materials

Onyx, Pearl, 14k Gold

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Antique Onyx Necklace For Sale on 1stDibs

Surely you’ll find the exact antique onyx necklace you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, 14k Gold and 18k Gold. Making the right choice when shopping for an antique onyx necklace may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 18th Century and a newer version made as recently as the 20th Century, both of which have proven very popular over the years. An antique onyx necklace from Amyn The Jeweler, Cartier and Erté — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes rose cut and cabochon alternatives. Finding an antique onyx necklace for sale for women should be easy, but there are 63 pieces available to browse for unisex as well as men, too.

How Much is a Antique Onyx Necklace?

The price for an antique onyx necklace starts at $129 and tops out at $130,000 with these necklaces, on average, selling for $2,580.

Finding the Right necklaces for You

We are fortunate to know much of the world’s long and dazzling history of necklaces, as this type of jewelry was so treasured that it was frequently buried with its owners.

Lapis lazuli beads adorned necklaces unearthed from the royal graves at the ancient Iraqi civilization of Sumer, while the excavation of King Tut’s burial chamber revealed a sense of style that led to a frenzy of Art Deco designs, with artisans of the 1920s seeking to emulate the elegant work crafted by Ancient Egypt’s goldsmiths and jewelry makers. 

In ancient times, pendant necklaces worn by royalty and nobles conferred wealth and prestige. Today, wearing jewelry is about personal expression: Luxury diamond necklaces exude confidence and can symbolize the celebratory nature of a deep romantic relationship, while paper-clip chain-link necklaces designed by the likes of goldsmith Faye Kim are firmly planted in the past as well as the present. Kim works exclusively with eco-friendly gold, and these fashionable, fun accessories owe to the design of 19th-century watch fobs. 

For some, necklaces are thought of as being a solely feminine piece, but this widely loved accessory has been gender-neutral for eons. In fact, just as women rarely took to wearing a single necklace during the Renaissance, men of the era layered chains and valuable pendants atop their bejeweled clothing. In modern times, the free-spirited hippie and counterculture movements of the 1960s saw costume-jewelry designers celebrating self-expression through colorful multistrand necklaces and no shortage of beads, which were worn by anyone and everyone. 

Even after all of these years, the necklace remains an irrefutable staple of any complete outfit. Although new trends in jewelry are constantly emerging, the glamour and beauty of the past continue to inform modern styles and designs. In a way, the cyclical history of the necklace differs little from its familiar looped form: The celebrated French jewelry house Van Cleef & Arpels found much inspiration in King Tut, and, now, their Alhambra collection is a go-to for modern royals. Vintage necklaces designed by David Webb — whose work landed him on the cover of Vogue in 1950, two years after opening his Manhattan shop — were likely inspired by the ornamental styles of ancient Greece, Mesopotamia and Egypt

On 1stDibs, browse top designers like Cartier, Tiffany & Co. and Bulgari, or shop by your favorite style, from eye-catching choker necklaces to understated links to pearl necklaces and more. 

Questions About Antique Onyx Necklace
  • 1stDibs ExpertDecember 4, 2023
    To tell if a necklace is antique, first look for hallmarks that indicate the maker. If you locate them, you can consult trusted online resources to find out when the company or artisan was active. To qualify as an antique, a necklace must be at least 100 years old. The presence of materials that are no longer commonly used to produce jewelry, like bakelite, camphor glass, foil opals and paste, can be good indicators that a piece is an antique. Antique jewelry is also more likely to have European- and rose-cut gemstones than modern cuts like the brilliant round. Because it can be difficult to date jewelry on your own, you may wish to consult an expert, like a certified appraiser or experienced dealer, for assistance. On 1stDibs, shop a large collection of antique necklaces.