Hallmark 18kt
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Roberto Coin Double Strand Nugget Collection Necklace 18kt Yellow & White Gold
By Roberto Coin
Located in San Diego, CA
Size
Weight: 31.7 Grams
Hallmark: 18KT ITALY 1226 VI & Signature RUBY
Includes: Elegant Box
Sku
Category
2010s Multi-Strand Necklaces
Materials
18k Gold, White Gold, Yellow Gold
18k White Gold Diamond Cross 1.00 Ct.s in Starburst Setting
Located in Los Angeles, CA
& PENDANT
hallmark:'18KT
Category
1990s American Contemporary Pendant Necklaces
Materials
Diamond, 18k Gold, White Gold
Golden Necklace with a Special Closing Mechanism
Located in AMSTELVEEN, NH
Jewel: Necklace; Weight: 117.8 grams; Length: 110 cm (adjustable closure); Hallmark: 18 kt gold 750
Category
20th Century Rope Necklaces
Mid-20th century 18kt gold bird brooch on a branch with colourful feathers
Located in Braintree, GB
century.
Hallmarked 18KT Gold & "1710"
Dimensions -
Size: 5.6 x 2.7 x 0.8 cm
Weight: 12.48 grams
Ruby
Category
Mid-20th Century European Brooches
Materials
Gold
Van Cleef & Arpels Sautoir Cadenas Long Necklace in 18 Kt Gold and Diamonds
By Van Cleef & Arpels
Located in Paris, FR
retaining 11 diamonds and a pattern stylizing the VCA hallmark. 18 Kt gold hallmark.
Gross Weight: 87.1g
Category
Vintage 1980s French Pendant Necklaces
Materials
Diamond, Gold, 18k Gold, White Gold
Rare Vintage 18ct Gold and Enamel Minnie Mouse Disney Earrings
By Walt Disney
Located in St Helens, GB
photographs.
WEIGHT ; 4.2 grams
HALLMARKS ; 18kt Italy Disney
Category
20th Century Italian Dangle Earrings
Gorgeous Retro Amethyst Diamond 18 KT Necklace
Located in Napoli, IT
condition keeping with age
Hallmarks: 18 KT assay
Gems: 7 round faceted cut amethysts totaling approx 8.00
Category
Vintage 1940s European Retro Link Necklaces
Materials
Amethyst, Diamond, 18k Gold
18kt gold owl brooch standing on a branch with coloured glass body and ruby eyes
Located in Braintree, GB
, and the eyes are set with rubies.
Made in Europe mid-20th century.
Hallmarked 18KT Gold and 521A
Category
Mid-20th Century European Brooches
Materials
Ruby, Gold, 18k Gold
18k Yellow Gold Pearl Tassel Earrings with Diamonds
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
metal: 18K YELLOW gold
type: EARRINGS
weight: 13.01 grS
LENGTH: 1.9 INCH
hallmark: 18KT"
Category
2010s American Contemporary Dangle Earrings
Materials
Diamond, Pearl, 18k Gold, Yellow Gold
18K Textured Yellow Gold Link Bracelet #15866
Located in Washington Depot, CT
!
Size: 6.5"
Weight: 17.1 g/ 10.9 dwt
Hallmark: 18KT Italy
Very good condition, professionally
Category
20th Century Link Bracelets
Materials
Gold, 18k Gold, Yellow Gold
Antique French 19th Century 18kt Gold Pendant Miniature with Painting
Located in Braintree, GB
1890's
Hallmarked 18kt gold
Has enamel writing in French - "Piété Filiale" - Translated - Filial Piety
Category
Antique 1890s French Victorian Pendant Necklaces
Materials
Gold, 18k Gold
18kt Yellow Gold Low Dome Ring with Champagne Rose Cut Diamonds w/ Blackened top
By Alberian & Aulde
Located in Weehawken, NJ
down
Hallmark: 18kt + A&A logo
Category
21st Century and Contemporary American Dome Rings
Materials
Diamond, Yellow Gold
Victorian Style English Diamond Opal 18 KT Carved Bangle
Located in Napoli, IT
english hallmarks 18 KT
Stunning carving scroll work embracing the center graduated array of 9 natural
Category
Vintage 1980s English Victorian Bangles
Materials
Diamond, Opal, 18k Gold
Pave Diamond Bombe 18K Yellow Gold Ring, circa 1970s
Located in Beverly Hills, CA
:
Metal: 18K yellow gold
Gemstone: Diamonds totaling 3 ct., G-H / VS-1
Circa: 1970s
Stamp/Hallmark: 18Kt
Category
20th Century Dome Rings
Materials
Diamond, Yellow Gold, 18k Gold
Vintage Blue Enamel & Diamonds Locket Pendant in 18 Karat Yellow Gold
Located in San Diego, CA
Yellow Gold Scalloped Overly Cage Design
Hallmark: 18KT on Bale
Includes: Elegant Box
Sku
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Yellow Gold, Enamel
18 Karat Yellow Gold Ladies Flower Brooch and Pendant with Diamonds
Located in Braintree, GB
Fully hallmarked 18kt gold.
Dimensions -
Size: 6.2 x 5.5 x 1.5 cm
Weight: 42 grams
Diamonds -
Cut
Category
1990s Brooches
Materials
Diamond, Yellow Gold
Multi Gem-Set Charm Necklace
Located in Firenze, IT
enamel,all set to platinum mounts, circa 1950. The chain later hallmarked 18kt white gold, measuring
Category
Vintage 1950s Italian Drop Necklaces
Materials
Diamond, White Gold, Gold, Enamel
Estate .90 Ct Diamond Drop Earrings 18 KT White Gold
Located in Napoli, IT
white gold, tested
Hallmarks:18 KT assay on the fasteners
Gems: 2 brilliant cut diamonds totaling approx
Category
Mid-20th Century European Contemporary Dangle Earrings
Materials
Diamond, White Gold
Eternity Modern Ring Band 18Kt White Gold With 1.08 Cts Of Ceylon Blue Sapphires
Located in Miami, FL
the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with other stackable
Category
Early 2000s American Modern Band Rings
Materials
Sapphire, Blue Sapphire, White Gold, 18k Gold, Gold
Eternity Ring Band in 18Kt White Gold with 1.25 Carats in Ceylon Blue Sapphires
Located in Miami, FL
the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with other stackable
Category
21st Century and Contemporary American Modern Band Rings
Materials
Blue Sapphire, White Gold, 18k Gold, Gold
18K Yellow Gold Pink Tourmaline Cabochon Statement Ring Size 5.5 #16484
Located in Washington Depot, CT
: 5.52mm
Sits 9.21mm high
Weight: 6.9 dwt/ 10.7 g
Hallmark: 18KT ITALY
Very good condition
Category
20th Century Fashion Rings
Materials
Tourmaline, Gold, 18k Gold, Yellow Gold
Panther Head 18k Two Tone Gold Green Tourmaline & Diamond Bangle Bracelet
Located in Boca Raton, FL
push in clasp and latch for added security.
Material: 18k yellow gold
Hallmark: 18kt
Measurement
Category
Late 20th Century Modern Bangles
Materials
Diamond, Tourmaline, 18k Gold, Yellow Gold
Roberto Coin 18k Yellow Gold Woven Silk Graduated Collar Necklace
By Roberto Coin
Located in Boca Raton, FL
push in clasp with latch for added security.
Material: 18k yellow gold
Hallmark: 18kt Italy
Category
1990s Italian Modern Choker Necklaces
Materials
Ruby, 18k Gold, Yellow Gold
Yellow Gold Italian Charm Link Bracelet
Located in Palm Desert, CA
charm is the hallmark 18Kt (star symbol) 1758 AR ITALY meaning the bracelet was made in the Arezzo
Category
Vintage 1980s Italian Retro Link Bracelets
Materials
Gold, 18k Gold, Yellow Gold
Italian Modernist Geometric Ring in 18Kt Yellow Gold with 1.04 Cts VS Diamonds
Located in Miami, FL
mm and raise 6 mm over the finger.
Stamped, with the Italian gold assay hallmark, "18 Kt
Category
Vintage 1970s Italian Modernist Cocktail Rings
Materials
Diamond, White Diamond, Yellow Gold, Gold, 18k Gold
Pearl and Multi-Gem 18K Yellow Gold Earrings
Located in Beverly Hills, CA
Pearls = 15 mm. diameter
Gemstone: Rubies, emeralds, diamonds
Circa: 1970s
Stamp/Hallmark: 18Kt
Weight
Category
Vintage 1970s Clip-on Earrings
Materials
Diamond, Emerald, Pearl, Ruby, 18k Gold, Yellow Gold
Italian Modern Cocktail Ring In 18Kt Yellow Gold With Diamonds And White Pearl
Located in Miami, FL
, sizeable
Stamped, with the maker's mark and the Italian gold assay hallmark, "18 KT".
Collateral: It is
Category
Early 2000s Italian Modern Cocktail Rings
Materials
White Diamond, Pearl, Diamond, Yellow Gold, 18k Gold, Gold
Italian Mid Century 1960 Jeweled Cocktail Ring 18Kt Yellow Gold European Diamond
Located in Miami, FL
Italian gold assay hallmark, "18 KT".
Collateral: It is accompanied by a presentation jewelry box
Category
Vintage 1960s Italian Post-War Cocktail Rings
Materials
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold
Van Cleef & Arpels Lapis Lazuli Vintage Alhambra Yellow Gold Cufflinks
By Van Cleef & Arpels
Located in Holland, PA
:
Measurements: 15mm x 12.5mm
Weight: 9.4 grams
Stamped Hallmarks: 18kt French Assay Mark, VCA OR, B91xxxxx
Category
1990s French Cufflinks
Materials
Lapis Lazuli, Yellow Gold
Eternity Classic Ring Band in 18Kt White Gold with 2.70 Carats in Pink Sapphires
Located in Miami, FL
the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with other stackable
Category
20th Century American Modern Band Rings
Materials
Pink Sapphire, Sapphire, White Gold, 18k Gold, Gold
1950s Emerald and Diamond Eternity Band in 18 Karat Yellow Gold
Located in Atlanta, GA
Width: 2.25 millimeters
Metal: 18 Karat Yellow Gold
Weight: 2.1 grams
Hallmark: 18KT
Finger to top of
Category
Mid-20th Century Unknown Retro Band Rings
Materials
Diamond, Emerald, 18k Gold, Yellow Gold
Eternity Ring Band in 18kt White Gold with 38 Round Diamonds
Located in Miami, FL
;
Stamped with the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with other
Category
Vintage 1940s European Art Deco Band Rings
Materials
White Diamond, Diamond, White Gold, 18k Gold, Gold
Contemporary 0.20ct Diamond Hoop Earrings Set in 18k White Gold
Located in London, GB
2.1 grams. The earrings are hallmarked 18KT.
Category
2010s Unknown Modern Hoop Earrings
Materials
Diamond, Gold, 18k Gold, White Gold
Modern Italian Ring in 18kt White Gold with 1.71cts in Diamonds and Tsavorites
Located in Miami, FL
.
Stamped, with Italian assay control hallmarks, "18 kt .750".
It is in perfect condition.
Collateral: It
Category
Early 2000s Italian Modern Cocktail Rings
Materials
White Diamond, Tsavorite, Diamond, White Gold, 18k Gold, Gold
Eternity Ring Band in 18kt White Gold with 1.62 Carats in Blue Sapphires
Located in Miami, FL
Inch).
Stamped with the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with
Category
Early 2000s European Modern Band Rings
Materials
Blue Sapphire, White Gold, 18k Gold, Gold
Italian Modern Cocktail Ring in 18kt Gold with 25.54 Cts Diamonds and Pink Coral
Located in Miami, FL
).
Stamped, with the maker's logo and the gold assay hallmarks, "18 KT .750".
It is in perfect condition
Category
Early 2000s Italian Modern Cocktail Rings
Materials
White Diamond, Diamond, Coral, Yellow Gold, 18k Gold, Gold
Eternity Ring Band in 18Kt White Gold with 1.82 Carats in Burmese Red Rubies
Located in Miami, FL
).
Stamped with the gold assay hallmark, “18 KT".
Note: Can be wear alone or as a divider with other
Category
Early 2000s American Modern Band Rings
Materials
Ruby, White Gold, 18k Gold, Gold
Italian Mid Century 1960 Cocktail Ring In 18Kt Gold With 28.22 Cts Fluted Lapis
Located in Miami, FL
.
Stamped in the shank with the Italian gold assay hallmark, "18KT".
It is in perfect condition, with
Category
Vintage 1960s Italian Modernist Cocktail Rings
Materials
Lapis Lazuli, Yellow Gold, 18k Gold, Gold
Gold Piaget Heart Earrings with Topaz
By Piaget
Located in AMSTELVEEN, NH
cm
Hallmark: 18 kt gold
Condition: As good as new
Category
21st Century and Contemporary Swiss Contemporary Clip-on Earrings
Materials
Topaz, Gold
Estate 18 Karat White Gold Pink and White Diamond Daisy Flower Fashion Necklace
Located in Scottsdale, AZ
chain measures 18.5” inches long. The pendant measures 11 mm wide. The chain is hallmarked 18KT Italy
Category
21st Century and Contemporary Pendant Necklaces
Materials
White Diamond, Pink Diamond, 18k Gold, White Gold
Italian Modern Suite in 18Kt Gold Akoya Pearls 4.20 Ctw Diamonds Sapphires
Located in Miami, FL
, "18 KT .750".
Collateral: They are accompanied by a presentation jewelry box.
Condition: The overall
Category
1990s Italian Modern Clip-on Earrings
Materials
White Diamond, Sapphire, Pearl, Diamond, Yellow Gold, 18k Gold, Gold
Exceptional Italian Designer Modern Bracelet in 18Kt Gold 21.12 Cts VS Diamonds
Located in Miami, FL
(Clover inside a shield) and the gold assay hallmark "18 kt" .
Collateral: It is accompanied by a
Category
Early 2000s Italian Modern Cuff Bracelets
Materials
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold
Italian Mid Century Rare Venetian 18Kt Cocktail Ring 12.42 Cts Diamonds Lapis
Located in Miami, FL
the shank with Italian assay hallmark, "18KT".
It is in perfect condition.
Collateral: It is
Category
Vintage 1960s Italian Post-War Cocktail Rings
Materials
White Diamond, Lapis Lazuli, Diamond, Yellow Gold, 18k Gold, Gold
Modern 1970 Gem Set Clips Earrings in 18kt Yellow Gold 3.42 Cts Rubies Diamonds
Located in Miami, FL
assay hallmark, "18 kt".
Collateral: They are accompanied by a presentation jewelry box.
Condition
Category
Vintage 1970s American Modern Clip-on Earrings
Materials
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
W 0.63 in D 0.5 in L 0.87 in
Heavenly 18 Karat White Gold Baguette and Round Diamond Cross Pendant on Chain
Located in Tustin, CA
” for 18 karat gold. Chain is hallmarked “18KT Italy”.
Face of cross pendant measures approximately
Category
20th Century American Modern Pendant Necklaces
Materials
Diamond, White Diamond, 18k Gold, White Gold
W 0.8 in D 0.2 in L 1.23 in
Carvin French Bombe Cocktail Ring in 18kt Gold with 47.07 Cts Rutile Quartz
By Carvin French
Located in Miami, FL
cat maker's mark and the assay hallmarks "18 KT".
Carvin French, was founded in 1954 by two Frenchmen
Category
Vintage 1970s American Modernist Cocktail Rings
Materials
Quartz, Yellow Gold, 18k Gold, Gold
Vintage 80s Diamond Earrings Clip Cocktail 18k Yellow Gold Estate Jewelry Large
Located in Torrance, CA
wide. The earrings are fitted with convertible post to clip backings.
Metal & Hallmark: 18 karat
Category
Late 20th Century Italian Modern Stud Earrings
Materials
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold
Fabergé Ladybug Egg Pendant 18k Gold Charm Red Enamel Diamond Eyes COA
By Fabergé
Located in Torrance, CA
charm is hallmarked "18kt" and "German" in addition to "Faberge" and "208/2000"
Category
Mid-20th Century German Modern Pendant Necklaces
Materials
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold, Enamel
GIA Certified Jadeite Green Jade Pendant in 18Kt Yellow Gold 102.27 Cts Gemstone
Located in Miami, FL
gold assay hallmark "18 KT".
Collateral: This piece is accompanied by the Gia laboratory report number
Category
Vintage 1980s American Modern Pendant Necklaces
Materials
Jade, Gold, 18k Gold, Yellow Gold
W 2.08 in D 0.48 in Dm 2.08 in L 2.44 in
Art Deco 1940 American Geometric Tank Ring 18Kt Gold 4.5 Cts Caliber Citrines
Located in Miami, FL
.
Stamped, with the gold assay hallmark, "18 KT".
Note: Immediately after the first world war, the creation
Category
Vintage 1930s American Art Deco Cocktail Rings
Materials
Citrine, Yellow Gold, 18k Gold, Gold
Cabochon Pink Tourmaline Ring Square Cocktail Estate 18k Yellow Gold Sz 6 Maz
Located in Torrance, CA
.
Metal & Hallmark: 18k yellow gold. The ring is hallmarked "18kt" and "Maz:"
Category
Mid-20th Century Unknown Modern Cocktail Rings
Materials
Tourmaline, Gold, 18k Gold, Yellow Gold
Ben Nighthorse Sapphire Ring Double V Rock Art Estate 18 Karat Yellow Gold
Located in Torrance, CA
inches) rising 7.5mm from the finger.
Metal & Hallmark: 18 karat yellow gold. The ring is hallmarked
Category
Mid-20th Century American Modern Band Rings
Materials
Sapphire, 18k Gold, Yellow Gold
2 Carat Colombian Emerald Stud Earrings with 0.90 Carat Diamond Jackets
Located in Atlanta, GA
Yellow Gold
Weight: 7.4 grams
Hallmark: 18KT on backs
Dimensions:
Emerald Studs: approximately 8 x 6.75
Category
Late 20th Century Unknown Contemporary Stud Earrings
Materials
Diamond, Emerald, 18k Gold, Yellow Gold
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H 0.26 in W 0.56 in L 0.63 in
Ancient Greek 350 BC Corinth Pegasus Stater Coin Necklace in 18Kt Yellow Gold
Located in Miami, FL
hallmark, "18 kt".
Coin Obverse description: Portrait bust of Athena facing to the left, with Corinthian
Category
Antique 15th Century and Earlier Greek Classical Greek Pendant Necklaces
Materials
18k Gold, White Gold, Yellow Gold
H 1.38 in W 1.38 in L 14.25 in
Contemporary Large Pendant in 18Kt Gold with 72.06 Ctw in Aquamarine & Diamonds
Located in Miami, FL
).
Stamped, with the gold assay hallmark, "18KT".
Birthstone: Aquamarine gemstones are the birthstone of
Category
21st Century and Contemporary American Contemporary Pendant Necklaces
Materials
Aquamarine, Diamond, Gold, 18k Gold, White Gold, Yellow Gold
H 0.6 in W 1.11 in L 2.37 in
Gold Pendant in Pear Shape with Diamond
Located in AMSTELVEEN, NH
(excl. necklace)
Weight: 2.3 grams
Dimensions: 20 x 10mm
Hallmark: 18 kt gold
Condition: New
Comes
Category
21st Century and Contemporary Dutch Contemporary Pendant Necklaces
Materials
Diamond, Gold
Modern Eternity Band in 18 Karat Rose Gold With Natural Yellow Diamonds
Located in Miami, FL
inch).
Stamped, with the maker's mark and the assay hallmark, "18 Kt.".
Note: Can be wear alone or as
Category
1990s American Modern Band Rings
Materials
Diamond, Yellow Diamond, Rose Gold, 18k Gold, Gold
Rhodochrosite Graduated Necklace in 18Kt Gold with 645.25 Cts Superb Gemstones
Located in Miami, FL
mark and the gold assay hallmark, "18 KT".
Rhodochrosite, draws its name from two Greek words, rhodon
Category
Vintage 1970s American Modernist Beaded Necklaces
Materials
Rhodocrosite, Gold, 18k Gold, Yellow Gold
1981 Tiffany & Co Aquamarine Ring Paloma Picasso Vintage 18k Gold Sz 6.5
By Paloma Picasso for Tiffany & Co.
Located in Torrance, CA
7mm from the finger.
Metal & Hallmark: 18 yellow gold. The ring is hallmarked "18kt" along with
Category
Late 20th Century American Modern Cocktail Rings
Materials
Aquamarine, Gold, 18k Gold, Yellow Gold
Edwardian 1905 Belle Epoque Cross In 18Kt Gold With Diamond and Sapphire
Located in Miami, FL
(2.01 x 1.18 Inches).
Hallmarks: 18 kt gold, .750/.999 Au.
Edwardian Jewelry Era
This era, like the
Category
Antique Early 1900s North American Edwardian Pendant Necklaces
Materials
Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, Yellow Gold, Pall...
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W 1.18 in D 0.18 in L 2.01 in
- 1
- ...
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Hallmark 18kt For Sale on 1stDibs
On 1stDibs, you can find the most appropriate hallmark 18kt for your needs in our varied inventory. Frequently made of gold, 18k gold and yellow gold, this item was constructed with great care. Our collection of these items for sale includes 5284 vintage editions and 1391 modern creations to choose from as well. You’re likely to find the perfect hallmark 18kt among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. There have been many well-made iterations of the classic hallmark 18kt over the years, but those made by Cartier, Van Cleef & Arpels and Tiffany & Co. are often thought to be among the most beautiful. While most can agree that any hallmark 18kt from our collection can easily elevate most outfits, but the choice of a diamond version from the 2749 available is guaranteed to add a special touch to your ensemble. A round cut version of this piece has appeal, but there are also brilliant cut and cabochon versions for sale. There aren’t many items for men if you’re seeking a hallmark 18kt, as most of the options available are for women and unisex.
How Much is a Hallmark 18kt?
On average, a hallmark 18kt at 1stDibs sells for $4,866, while they’re typically $10 on the low end and $550,000 for the highest priced versions of this item.
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