Unknown Jewelry
260
52,212
4,898
to
4,948
36,031
18,361
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13
6
916
8,904
57,110
66,906
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1,677
4,075
2,681
2,069
3,432
3,512
3,438
4,540
2,626
494
148,198
2,672
1,998
1,798
1,603
33,616
22,502
992
41,057
18,060
16,885
12,882
10,980
34,432
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9,924
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2,380
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1,097
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1
Period: 20th Century
Creator: Unknown
An Art-Deco c1930's Gilson Synthetic Emerald 9K Yellow Gold Bar Brooch
Located in MELBOURNE, AU
Beautifully crafted in 9K Gold (stamped 9ct)
this stunning Bar Brooch
is of timeless & classic design
dating from Art-Deco (c1930's) period
It centers a bezel set Gilson Synthetic...
Category
1930s English Art Deco Vintage Unknown Jewelry
Materials
Emerald, Yellow Gold, 9k Gold
1950 Sterling Silver Matchbox Pendent
Located in Scottsdale, AZ
Introducing the exquisite 1940s Sterling Silver Engraved Matchbox Pendant, a delightful fusion of function and style. Crafted from sterling silver, this pendant not only serves as a ...
Category
1950s Vintage Unknown Jewelry
Materials
Sterling Silver
Art Nouveau Peridot Pearl 14 Karat Yellow Gold Festoon Antique Drop Necklace
Located in Philadelphia, PA
Designed as a cable link chain featuring a swagged station centering a cushion cut peridot
Weighing approximately 1.94 carats - transparent medium yellowish-green in color
Prong set...
Category
Early 1900s Art Nouveau Antique Unknown Jewelry
Materials
Pearl, Peridot, Gold, 14k Gold, Yellow Gold
Vintage Colombian emerald and diamond cluster ring, French, circa 1960
Located in London, GB
Vintage Colombian emerald and diamond cluster ring. Centrally set with an octagonal emerald-cut natural Colombian emerald with no colour enhancement and minor clarity enhancement in ...
Category
1960s Vintage Unknown Jewelry
Materials
Diamond, Emerald, Platinum
Retro Style Diamonds 18k Gold Necklace
Located in MADRID, ES
Introducing a truly exquisite piece of jewelry: the 18k Gold Retro Style Choker Necklace adorned with 0.60 ct Single Cut Diamonds. This stunning pie...
Category
20th Century Unknown Retro Unknown Jewelry
Materials
Diamond, 18k Gold
800 Silver Tray Platter, Pitcher Carafe, and 6 Small Chalice Goblets
Located in Sherman Oaks, CA
800 Silver Tray Platter, Pitcher Carafe, and 6 Small Chalice Goblets
800 SILVER TRAY, PITCHER + 6 SMALL CHALICE CUPS GOBLETS
WEIGHT: 342.4 GRAMS
GOBLETS SIZE: 2 1/8" H X .5" W
PITCH...
Category
20th Century Asian Modern Unknown Jewelry
Materials
Silver
Mid-Century 0.94 CTW Diamond Platinum Seven Stone Vintage Engagement Ring
Located in Philadelphia, PA
Centering an old European cut diamond weighing approximately 0.70 carat
I color with VS2 clarity - prong set in pierced geometric basket
Flanked by cathedral shoulders bezel set wit...
Category
1950s Vintage Unknown Jewelry
Materials
Diamond, Platinum
Rare Important Gorgeous Meissen Dresden Style Porcelain Children Conch Shell
Located in New York, NY
We are are offering this Large Estate Signed Meissen Style / Dresden Style Centerpiece Conch Shell Bowl with 3 Angelic Cherubs Maidens Surrounded Holding the Shell. Beautifully Handp...
Category
20th Century Unknown Jewelry
Vintage 18kt. gold flower-shaped pair of clip-on earrings set with lapis lazuli
Located in Braintree, GB
Vintage 18kt. yellow gold flower-shaped pair of clip-on earrings set with lapis lazuli.
Made in circa 1980's
Please note: clips have been added later and bear the 9kt. gold mark.
Di...
Category
1980s European Vintage Unknown Jewelry
Materials
Lapis Lazuli, Gold, 18k Gold, 9k Gold
Vintage Circa 1970s Platinum Natural Old Cut Diamond Decorated Solitaire Ring
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 4 grams.
Totally is diamond 0.62 carat.
The diamond is has Fancy color and vs clarity.
Ring size is US 6.5 (We offer free resizing)
Acid tes...
Category
1970s European Retro Vintage Unknown Jewelry
Materials
Diamond, Platinum
Vintage Gold & Diamond Necklace
Located in New York, NY
Vintage Gold & Diamond Necklace
A yellow gold necklace with nine pave square motif designs.
Metal Type: 18 Karat Yellow Gold
Approximate Measurements: 13 inches
5 inches diam...
Category
1950s Vintage Unknown Jewelry
Materials
Diamond, Gold, Yellow Gold
Jade and Diamond Cocktail ring in White Gold
Located in BALMAIN, NSW
Recent Jade and Diamond Cocktail ring in White Gold.
A lovely, like new, Jade and Diamond Cocktail ring that sits 1960's style proudly o...
Category
1960s Vintage Unknown Jewelry
Materials
White Diamond, Jade, Gold, White Gold
Antique silver young child portrait pendant
Located in Versailles, FR
For sale a rare Art Deco era silver pendant, showcasing a scene of innocence and sweetness of a very cute child in his/her pyjama.
The child's adorable presence is enhanced by intri...
Category
Early 20th Century German Art Deco Unknown Jewelry
Materials
Silver
Vintage 18k Gold Natural Diamond And Amethyst Topaz Decorated Tank Ring
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 17.8 grams.
Totally is diamond about 0.65 carat.
The diamond is has F-G color and vs-vvs clarity.
Totally is topaz about 2.50 carat.
Totally ...
Category
1990s European Retro Unknown Jewelry
Materials
Amethyst, Diamond, Topaz, 18k Gold
Early Art Deco 0.75 CTW Old Mine Cut Diamond 14 Karat Two-Tone Gold Bypass Ring
Located in Philadelphia, PA
Centering an old mine cut diamond weighing approximately 0.55 carat
O-P color with SI1 clarity - set in grooved white gold bezel
Flanked bypass-style shoulders with single cut diamo...
Category
1920s Vintage Unknown Jewelry
Materials
Gold, 14k Gold, White Gold, Yellow Gold
An Art-Deco c1930's Garnet (0.60ct) & 9K Gold Bar Brooch, with security chain.
Located in MELBOURNE, AU
Crafted with refined elegance
this stunning Bar Brooch
is of Australian provenance, dating from Art-Deco period.
Of lovely bar design,
it centers a bezel set Natural Garnet of 0....
Category
1930s English Art Deco Vintage Unknown Jewelry
Materials
Garnet, 9k Gold
Boucles d’oreilles duo de platine or blanc 18 carats, émeraudes et diamants
Located in OUISTREHAM, FR
Portez vos boucles d’oreilles duo d’émeraudes et de diamants avec élégance !
Cette création raffinée est l’accessoire parfait pour compléter votre look. Ses émeraudes taille émeraud...
Category
Late 20th Century French Unknown Jewelry
Materials
White Diamond, Emerald, 18k Gold, White Gold, Platinum
1970s Jade Jadeite Beaded Bracelet
Located in Scottsdale, AZ
Adorn your wrist with the elegance of the 1970s Jade Jadeite Beaded Bracelet, a timeless piece that radiates natural beauty and sophistication. This Chinese jade malà...
Category
1970s Vintage Unknown Jewelry
Materials
Jade
Edwardian Jelly Opal Diamond Platinum 18 Karat Rose Gold Antique Halo Ring
Located in Philadelphia, PA
Centering an oval-shaped jelly opal cabochon measuring 10.0 x 8.0 mm
Transparent white body color with spectral play-of-color
Bezel set in platinum topped head with halo surround
...
Category
1910s Edwardian Vintage Unknown Jewelry
Materials
Diamond, Opal, Gold, 18k Gold, Rose Gold, Platinum
1960's Opal Diamond Ruby Platinum 18 Karat Gold Vintage Goose Bird Brooch
Located in Philadelphia, PA
Designed as a stylized goose in flight with an opal cabochon body
Abstractly shaped and measuring 12.0 x 18.0 mm - prong set
Translucent white body color with spectral play-of-color ...
Category
1960s Vintage Unknown Jewelry
Materials
Diamond, Opal, Ruby, Gold, 18k Gold, Platinum
Vintage Platinum Diamond Solitaire Ring
Located in London, GB
This is a vintage 18ct yellow gold platinum diamond ring. Set in a platinum raised square mount is a round diamond (0.33ct) with arrowed platinum shoulders.
Condition: Used (minor damage to the diamond)
Weight: 2.9 grams
Size: N
Face Dimensions: 5mm x 5mm
Marked: 18ct & Plat
Box: The Vintage...
Category
20th Century Unknown Jewelry
Materials
Diamond, Gold, Yellow Gold, Platinum
Invisible set sapphire and diamond ring, French, circa 1940
Located in London, GB
Invisible set sapphire and diamond ring. Set with seventy six tapered baguette cut natural unenhanced sapphires in open back invisible settings with an app...
Category
1940s French Vintage Unknown Jewelry
Materials
Diamond, Sapphire, Platinum
1980s Opal Diamond 18 Karat Yellow White Gold Triangular Vintage Halo Ring
Located in Philadelphia, PA
Centering a triangle-shaped opal cabochon measuring 8.0 x 8.0 mm
Translucent white in body color with spectral play-of-color
Prong set in white gold head with halo surround
Compris...
Category
1980s Vintage Unknown Jewelry
Materials
Diamond, Opal, Gold, White Gold
Double Strand Deep Intense Green Jade, Onyx, Gold Beaded Necklace, c1960's.
Located in MELBOURNE, AU
Comprising of fine & well-matched
Natural Jadeite beads of 7mm each
of deep intense green colour
Sections of 4 are separated by
black faceted onyx beads,
creating an elegant look
Completed by a comfortable & secure parrot clasp,
crafted in 18K yellow gold
The necklace is double strand,
with 1 strand being longer than the other
with average length of 42cm
Weight: 36gr.
Vintage c1950...
Category
1960s Australian Retro Vintage Unknown Jewelry
Materials
Jade, Onyx, Gold, 18k Gold
Art Deco Old Mine Cut Diamond Platinum Brooch
Located in Seattle, WA
An antique original Art Deco brooch with a classic look and elegant details. Eleven graduated diamonds with a total carat weight of approximately 4.26ctw shine bright in gleaming pla...
Category
Early 20th Century Art Deco Unknown Jewelry
Materials
Diamond, Platinum
Vintage 14K Gold Cat's Eye Aquamarine and Diamond Ring
Located in Henderson, NV
Crafted in 14K yellow gold, the ring features an oval cabochon cut aquamarine accented by three diamonds, supported by split shoulders, completed by a three millimeter wide band.
Aqu...
Category
Late 20th Century Unknown Jewelry
Materials
Aquamarine, Diamond, Gold, 14k Gold, Yellow Gold
Vintage Circa 1980s 18k Gold Natural Diamond And Ruby Decorated Ring
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 7.6 grams.
Totally is diamond 0.40 ct.
The diamond is has H color and vs-s1-s2 clarity.
Totally is ruby 1.50 ct.
Ring size is US 6.5
Box is n...
Category
1980s European Retro Vintage Unknown Jewelry
Materials
Diamond, Ruby, 18k Gold
Edwardian Ruby and Diamond Crescent Brooch
Located in London, GB
Here we we have a classic crescent brooch dating back to the Edwardian era. This antique piece has been crafted from 18ct yellow gold into the shape of a moon crescent which plays ho...
Category
Early 20th Century Edwardian Unknown Jewelry
Materials
Diamond, Ruby, Gold, Yellow Gold
18 kt. White Gold Brooch with 1.52 ct. Brilliant Cut Diamonds
Located in Antwerp, BE
Magnificant 18 kt. White Gold Brooch with 1.52 ct. Brilliant Cut Diamonds
Diamonds: Brilliant cut diamonds together approx. 1.52 ct.
Material : 18 kt. white gold
Measurements: 48...
Category
20th Century Italian Artisan Unknown Jewelry
Materials
Diamond, 18k Gold, White Gold
Large Black Enamel and Diamond Bow Pin / Brooch in 18k Yellow Gold
Located in La Jolla, CA
Estate Black Enamel and Diamond Bow Pin / Brooch in 18k Yellow Gold
Large Black Enamel Diamond Bow Brooch features a Pear shaped Pave Diamond section in the center and Diamond patte...
Category
20th Century North American Unknown Jewelry
Materials
Diamond, 18k Gold, Yellow Gold, Enamel
Antique Pearl, Diamond, Platinum And Gold Cluster Pendant, Circa 1910
Located in London, GB
An antique, pearl and diamond cluster pendant, with a silver white natural bouton pearl, in the centre of a diamond cluster, of eight alternating larger and smaller old-cut diamonds,...
Category
1910s English Edwardian Vintage Unknown Jewelry
Materials
Diamond, Pearl, Gold, Platinum
Clip-on Earrings with Pearls, Rubies & Diamonds in 18 Karat Yellow & White Gold
Located in Lucerne, CH
Introducing a pair of clip-on earrings in 18-karat yellow and white gold, highlighting exquisite pearls and elegant gemstones.
At the heart of each earring, one captivating South Se...
Category
Late 20th Century European Modern Unknown Jewelry
Materials
Diamond, Cultured Pearl, Ruby, Gold, 18k Gold, White Gold, Yellow Gold
Vintage 18k Gold Natural Diamond Decorated Heart Pendant Necklace
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 14.5 grams.
Totally is diamond 2.30 ct.
The diamond is has G-H color and vvs-vs-s1 clarity.
Totally is lenght 41 cm.
Please contact for any qu...
Category
1990s European Retro Unknown Jewelry
Materials
Diamond, 18k Gold
Vintage Circa 1970s 18k Gold Natural Diamond And Ruby Decorated Brooch
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 6.1 grams.
Totally is brilliant cut diamond 0.65 carat.
Totally is rose cut diamond 0.25 carat.
Totally is ruby about 0.75 carat.
Dimention i...
Category
1970s European Retro Vintage Unknown Jewelry
Materials
Diamond, Ruby, 18k Gold
Vintage Rose Cut Diamond Flower Ring
Located in London, GB
Here we have an elegant 18ct yellow gold diamond ring. An open frame plays host to a cluster of platinum milgrain set rose cut diamonds collectively forming a flower motif. This flor...
Category
20th Century Unknown Jewelry
Materials
Diamond, Gold, Yellow Gold, Platinum
Vintage Aquamarine & Diamond Bracelet in Platinum 7.5 inches
Located in La Jolla, CA
Vintage Aquamarine & Diamond Bracelet in Platinum 7.5 inches
Vintage Aquamarine & Diamond Bracelet features rounded T shaped links with 2 Round Brilliant Diamonds each and a centerpiece light blue Emerald cut Aquamarine surrounded by Round Brilliant Diamonds set in Platinum. The bracelet is secured by a diamond-studded clasp with safety bar.
Total emerald weight is 4.40 carats.
Total diamond weight is 4.90 carats estimated.
Bracelet measures 7.5 inches long and .60 inch wide...
Category
20th Century North American Unknown Jewelry
Materials
Aquamarine, Diamond, Platinum
Vintage Three Stone Diamond Ring
Located in London, GB
This is a vintage 18ct yellow gold and platinum three stone diamond ring featuring three brilliant round cut diamonds. The central round diamond is set in a six pronged mount as are ...
Category
20th Century Unknown Jewelry
Materials
Diamond, Gold, Yellow Gold, Platinum
French Retro Ruby and Diamond Bracelet Watch in 18k Rose Gold
Located in La Jolla, CA
Vintage French Retro Ruby and Diamond Bracelet Watch in 18K Rose Gold
French Retro bracelet watch beautifully crafted in 18K Rose Gold...
Category
Mid-20th Century Unknown Retro Unknown Jewelry
Materials
Diamond, Ruby, 18k Gold, Rose Gold
14K Yellow Gold, 4.00 CT Green Tourmaline and Diamond Cocktail Ring
Located in Miami, FL
Adorn your finger with timeless allure wearing this vintage green tourmaline ring, a captivating homage to elegance and grace. The lush green hue of the tourmaline gemstone exudes an...
Category
Late 20th Century European Medieval Unknown Jewelry
Materials
Diamond, Tourmaline, Gold, 14k Gold, Yellow Gold
Vintage Circa 1970s 14k Gold Natural Diamond Decorated Bracelet
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 27 grams.
Totally is diamond 0.50 ct.
The diamond is has H-I-J-K color and vs-s1-s2-s3 clarity.
Total lenght is 18.5 cm.
Box is not included.
...
Category
1970s European Retro Vintage Unknown Jewelry
Materials
Diamond, 14k Gold
Vintage Sapphire and Diamond Cluster Ring
Located in London, GB
This is a marvellous 18ct yellow gold ring focally featuring a single oval shaped sapphire at the centre of the face believed to be of Ceylon origin. The ring's open, multi-layered s...
Category
20th Century Unknown Jewelry
Materials
Diamond, Blue Sapphire, Gold, Yellow Gold
Antique 18ct Gold Amethyst Diamond and Peridot Suffragette Ring
Located in Brighton, GB
Antique Suffragette Ring
18ct Gold Stamped
Hallmarked Birmingham 1915
Beautiful, suffragette piece made in support & celebration of the suffrage...
Category
Early 20th Century English Unknown Jewelry
Materials
Amethyst, Diamond, Peridot, Gold, 18k Gold
10 Karat Yellow Gold Vintage Lemon Quartz Ring
Located in Scottsdale, AZ
Designer: custom
Material: 10K yellow gold
Dimensions: ring top measures 18.30mm
Ring Size: 7.25 (complimentary sizing available)
Weight: 6.88 grams
Category
20th Century Unknown Jewelry
Materials
Quartz, 10k Gold, Yellow Gold
1900s Diamond Ruby and Green Sapphire 18k Yellow Gold Gordon Highlanders Cap
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive antique 0.23 carat diamond, 0.07 carat ruby and 0.03 green sapphire, 18 karat yellow gold and silver set Gordon Highlanders Bydand cap badge...
Category
Early 1900s Unknown Antique Unknown Jewelry
Materials
Diamond, Ruby, Green Sapphire, Yellow Gold
Vintage 14 Karat Gold and Moonstone Stud Earrings
Located in New York, NY
Vintage 14 Karat Gold and Moonstone Stud Earrings c.1960s
Each earring weighs 1.8 grams
14.5mm diameter
Category
Mid-20th Century Unknown Jewelry
Materials
Moonstone, Gold, 14k Gold
Vintage Circa 1980s 18k Gold Natural Diamond And Ruby And Sapphire Ring
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 7.8 grams.
Totally is ruby 1 ct.
Totally is 0.15 sapphire ct.
Totally is diamond 0.07 ct.
The diamond is has H color and s2 clarity.
Ring size...
Category
1980s European Retro Vintage Unknown Jewelry
Materials
Diamond, Ruby, Sapphire, 18k Gold
Art Deco White Gold Bracelet Diamonds and Sapphire
Located in Berlin, BE
Step into the lavish world of Art Deco with this stunning bracelet, a true masterpiece of fine jewelry. The bracelet is crafted from solid 14k white gold and features a gorgeous open...
Category
Early 20th Century German Art Deco Unknown Jewelry
Materials
Diamond, Sapphire, 14k Gold, White Gold
Vintage Emerald and Old Cut Diamond Ring
Located in London, GB
Here we have an excellent emerald and diamond tablet ring. This piece has been created using components of an authentic Art Deco necklace a...
Category
1930s Art Deco Vintage Unknown Jewelry
Materials
Diamond, Emerald, Gold
Vintage Kashmir No Heat Sapphire Diamond Platinum Three Stone Ring
Located in Miami, FL
This Rare Antique Natural No heat Kashmir Sapphire Diamond Three Stone Engagement Ring boasts beauty with an approximate total weight of 5.8 grams.
This vintage three-stone sapphire diamond ring is crafted in solid Platinum, Featuring a 1.69 Carat oval cut AGL certified Natural corundum Sapphire Kashmir origin prong-set,
Its Platinum antique filigree ring...
Category
1960s Unknown Art Deco Vintage Unknown Jewelry
Materials
Diamond, Sapphire, Platinum
Vintage Circa 1980s Natural Diamond Decorated Strong Ring
Located in Fatih/İstanbul, 34
In very good condition.
Total weight is 5.8 grams.
Totally is diamond 0.45 carat.
The diamond is has G-H color and vs-s1.
Ring size is US 6.2 (We offer free resizing)
We can make an...
Category
1980s European Retro Vintage Unknown Jewelry
Materials
Diamond, 18k Gold
Vintage Burmese Ruby and Diamond Cluster Ring
Located in London, GB
Here we have a fabulous ruby and diamond cluster ring. This vintage piece showcases a single oval shaped natural Burmese ruby at the centre which possesses a vivid red colour with a ...
Category
20th Century Unknown Jewelry
Materials
Diamond, Ruby, Gold, 22k Gold, Yellow Gold
Edwardian 1.74 CTW Old Mine Cut Diamond Platinum 18 Karat Yellow Gold Ring
Located in Philadelphia, PA
Designed as a Toi et Moi style bypass ring terminating with two old mine cut diamonds prong set in platinum
Weighing approximately 1.68 carats total - H/I color with VS2 clarity
Fla...
Category
1910s Edwardian Vintage Unknown Jewelry
Materials
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Retro 1945-1950 Rosette Design 1.70 carats Diamond white Gold Ring
Located in MADRID, ES
Introducing a truly exceptional piece: the Retro Design Ring featuring a vintage Rosette from the 1945-1950 era, meticulously crafted in 18k white gold. Adorned with brilliant-cut di...
Category
1940s Unknown Retro Vintage Unknown Jewelry
Materials
Diamond, White Gold
Antique Art Deco Platinum Old Euro Marquise Diamond and Emerald Shield Ring
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum Old Euro Marquise Diamond and Emerald Shield Ring. This gorgeous antique shield ring is crafted in platinum. Th...
Category
1920s Art Deco Vintage Unknown Jewelry
Materials
Diamond, Emerald, Platinum
18k Yellow Gold Necklace
Located in New York, NY
This is a fabulous 18k yellow gold necklace. The necklace measures 16 1/4 inches in length and 15mm in width. The necklace is stamped 750 ITALY and weighs 65.1 grams.
Category
20th Century Unknown Jewelry
Materials
18k Gold
Vintage Black Pearl and Diamond Cluster Ring
Located in London, GB
Here we have a gorgeous black pearl and diamond cluster ring. A round black pearl sits proud at the centre of the face and is accentuated by a circulating frame of round faceted old ...
Category
20th Century Unknown Jewelry
Materials
Diamond, Black Pearl, Gold, Yellow Gold
Edwardian Diamond Platinum 14 Karat Yellow Gold Antique Pear Stickpin
Located in Philadelphia, PA
Centering a pear cut diamond weighing approximately 0.11 carat
J color with SI1 clarity - set in milgrain bezel with halo surround
Comprised of old European cut diamonds - well match...
Category
1910s Edwardian Vintage Unknown Jewelry
Materials
Diamond, Gold, 14k Gold, Yellow Gold, Platinum
Vintage Oval Signet Ring
Located in London, GB
This is a vintage 9ct yellow gold oval signet ring. The ring has a plain face and is suitable for engraving.
Condition: Used (Very Good)
Weight: 7.80 grams
Ring Size: T 1/2 (62)
Face Dimensions: 13mm x 11mm
Hallmarked: Yes, Birmingham 1989
Period: Circa. 1980s
Box: The Vintage Jeweller...
Category
1980s Vintage Unknown Jewelry
Materials
Gold, Yellow Gold
Unknown jewelry & watches for sale on 1stDibs.
Find a range of Unknown jewelry & watches available on 1stDibs. Each of these unique items was designed with extraordinary care, often using gold. While looking for the most stylish antique or vintage Unknown jewelry to pair with your ensemble, you’ll find that Unknown diamond jewelry & watches, from our inventory of 80,710, can add a particularly distinctive touch to your look. We have 126,010 pieces in this collection as well as a number of other designs by this jeweler. While this collection reflects work that originated over various time periods, most of these items were designed during the 21st century and contemporary. Prices for Unknown jewelry & watches can differ depending upon gemstone, time period and other attributes. On 1stDibs, the price for these items starts at $20 and tops out at $7,123,285, while pieces like these, on average, can sell for $2,925.