Skip to main content

18ct Agate

6
to
10
280
60
208
128
79
52
28
26
24
23
14
10
8
7
7
7
6
5
5
4
4
3
3
3
3
3
2
2
2
1
1
1
1
1
1
1
1
87
18
14
10
5
Sort By
Vintage Agate Scorpio Zodiac Pendant 18ct Gold Scorpion
Located in Kendal, GB
– Scorpion Height 33mm x Width 32mm x Depth 8mm METAL: 18ct Gold (Stamped) STONES: Agate (Width 44 x Height
Category

20th Century Pendant Necklaces

Materials

Agate, Gold, 18k Gold, Yellow Gold

Vintage Agate Scorpio Zodiac Pendant 18ct Gold Scorpion
Vintage Agate Scorpio Zodiac Pendant 18ct Gold Scorpion
Free Shipping
H 2.33 in W 1.74 in D 0.12 in
Pink Faceted Agate on 18'' Chain in 18ct Rose Gold
Located in London, GB
Pink Faceted Agate Set In 18ct Rose Gold On 18ct 18” Rose Gold Chain
Category

2010s Pendant Necklaces

Materials

Agate, Rose Gold, 18k Gold

18ct Yellow Gold Crystal Haze Gold Struck Green Agate Earrings
By Stephen Webster
Located in Bishop's Stortford, Hertfordshire
Green Agate set sections Surrounded with mixed cut Green Tourmaline and Round Brilliant Cut Diamonds
Category

2010s Unknown Contemporary Drop Earrings

Materials

Agate, Crystal, Yellow Gold

Superb 18ct White Gold Diamond Sapphire Agate and Onyx Pendant
Located in St Helens, GB
A stunning contemporary pendant. Solid 18 carat white gold example. Designed with many round
Category

20th Century Pendant Necklaces

Materials

Agate, Diamond, Onyx, Sapphire, White Gold

10.1 ct Blue Agate Cocktail Ring With Pave Diamonds Made In 18k Gold & Silver
By Artisan NYC
Located in New York, NY
18k:2.79g,D:1.34ct AGATE BLUE:10.1Cts Size: 26X17 MM
Category

21st Century and Contemporary Indian Art Nouveau Cocktail Rings

Materials

Diamond, Agate, 18k Gold, Yellow Gold, Silver

Victorian Antique Agate Fob in 18ct Yellow Gold
Located in Yorkshire, West Yorkshire
from a chain as a necklace. This unique antique quality 18ct Yellow Gold fob pendant is set with Agate
Category

Antique 1880s Unknown Victorian More Jewelry

Materials

Yellow Gold

Black Agate Ovals, Green Agate Flowers, Emeralds, Diamonds, White Gold Bracelet
Located in Marcianise, Marcianise (CE)
Green Agate 9.10 g Total weight 35.20 g Lenght 18 cm Width 2cm RF + GGUEF For any inquiries, please
Category

Vintage 1950s Italian Retro Link Bracelets

Materials

Agate, Diamond, Emerald, 14k Gold, White Gold

Blue Agate Diamond Yellow Gold Earrings
Located in New York, NY
18k yellow gold blue agate intaglio earrings with diamonds containing 10 full cut diamonds
Category

Vintage 1980s Italian Contemporary Clip-on Earrings

Materials

Agate, Diamond, 18k Gold

Antique Agate Intaglio Ring Depicting Lion
Located in Milano, MI
Intaglio ring in 18ct gold with bicolour agate finely engraved with armed lion, of English
Category

Antique Early 1900s British Signet Rings

Materials

Agate, 18k Gold, Yellow Gold

18ct Yellow Gold Sardonyx Cameo Ring
Located in Glasgow, GB
An 18ct yellow gold cameo ring. The 19th century sardonyx cameo, depicting a man with head in
Category

20th Century British Classical Roman Signet Rings

Materials

Agate, 18k Gold, Yellow Gold

18ct Gold Hardstone Cameo Pendant, circa 1870s
Located in Glasgow, GB
A late 19th century 18ct yellow gold and hardstone cameo pendant. The five-ray star pendant is
Category

Antique 1870s Unknown Late Victorian Pendant Necklaces

Materials

Agate, Gold, 18k Gold, Yellow Gold

18ct Gold Bloodstone Intaglio Signet Ring, 1999
Located in Glasgow, GB
This 18ct yellow gold signet ring features a bloodstone set into an oval head, engraved with an
Category

1990s British Modern Signet Rings

Materials

Agate, Gold, 18k Gold, Yellow Gold

Georgian Dendritic Agate Garnet 18 KT Cluster Ring
Located in Napoli, IT
Hallmarks: none/worn Gems: 1 oval cabochon cut dendritic agate of 9 x 7 mm. – 18 antique step cut natural
Category

Antique 1780s European Georgian Signet Rings

Materials

Agate, Garnet, Gold

Percossi Papi Signed Agate Multi gem 18 KT Cufflinks
Located in Napoli, IT
This beautiful pair of gent cufflinks is 1970 circa Hand crafted as unique pair of solid 18 KT gold
Category

Vintage 1970s Italian Contemporary Cufflinks

Materials

Agate, 18k Gold

Earrings set with agate and diamonds 18k pink gold
Located in The Hague, ZH
18k pink gold ear studs with flower head, cut yellow agate and brilliant cut diamond, approximately
Category

2010s Dutch Modern Stud Earrings

Materials

Agate, Diamond, Gold, 18k Gold

Victorian 2.66 Carat Agate and 18k Yellow Gold Masonic Ring
Located in Jesmond, Newcastle Upon Tyne
A excellent, fine and impressive, antique 2.66 carat carved agate and 18 karat yellow gold Masonic
Category

Antique 1890s Unknown Cocktail Rings

Materials

Agate, Yellow Gold

Antique Banded Agate and 18 Carat Gold Memorial Ring
Located in Chipping Campden, GB
The gorgeous banded agate stone in this memorial ring is jet black and has a stylish white line
Category

Antique 1850s British Victorian Signet Rings

Materials

Agate, Gold

Reversible Paloma Picasso Gold And Silver Earrings With Agate
By Paloma Picasso for Tiffany & Co.
Located in Dubai, DU
style. One side is sleekly rendered in 18ct gold and the other in oxidised sterling silver, allowing you
Category

1990s Contemporary Drop Earrings

Materials

Agate, 18k Gold, Sterling Silver

Earrings studs set with agate and diamonds 18k pink gold
Located in The Hague, ZH
18k rose gold ear studs with flower-cut yellow agate and brilliant cut diamond 0.08 ct - G/H - VS
Category

2010s Dutch Modern Stud Earrings

Materials

Agate, Diamond, Gold, 18k Gold

Vintage Oval Agate Intaglio and Black Diamond Surround Pendant Necklace
Located in Pasadena, CA
is then set in 14KT Gold with a 1.28 CT shimmering Black Diamond surround and paired with a new 18
Category

20th Century American Pendant Necklaces

Materials

Agate, Black Diamond, 14k Gold

Syna White Agate Yellow Gold Sugarloaf Earrings with Diamonds
By Syna Jewels
Located in Fort Lee, NJ
Created in 18 karat yellow gold White agate sugarloaf cabochons 4 cts approx Diamonds 0.10 ct
Category

2010s Unknown Contemporary Stud Earrings

Materials

Brown Diamond, Agate, Diamond, 18k Gold, Yellow Gold

An Archaeological Revival Gold And Agate Intaglio Necklace Circa 1850
Located in Firenze, IT
The woven chain set to the front with a large agate intaglio depicting Hercules. Bearing 18ct gold
Category

Antique Mid-19th Century Italian Etruscan Revival Pendant Necklaces

Materials

Agate, Gold, 18k Gold

Antique Victorian Curb Bracelet 9ct Gold With Seven Agate Fobs
Located in Kendal, GB
METAL: Chain 9ct Gold – Fobs 9ct, 15ct & 18ct (Stamped) STONES: Bloodstone, Carnelian, White Agate AGE
Category

Antique 1880s European Victorian Charm Bracelets

Materials

Agate, Gold, 9k Gold, Yellow Gold

Vintage Ladies 18K Rose Gold Agate Diamond Narrow Hexagon Tag Bangle Bracelet
Located in Houston, TX
gold diamond and agate vintage bracelet. The metal was tested and determined to be 18K rose gold
Category

Late 20th Century Unknown Bangles

Materials

Agate, Diamond, Gold, 18k Gold, Rose Gold

Natural White Agate Ring with 18 Carat Yellow Gold, Cushion
Located in Kirschweiler, DE
This Natural White Agate Ring with 18 Carat Yellow Gold is totally handmade. Cutting as well as
Category

2010s German Arts and Crafts Cocktail Rings

Materials

Agate, Gold, 18k Gold, Yellow Gold

Natural White Agate Ring with 18 Carat Yellow Gold, Cushion
Located in Kirschweiler, DE
This Natural White Agate Ring with 18 Carat Yellow Gold is totally handmade. Cutting as well as
Category

2010s German Arts and Crafts Cocktail Rings

Materials

Agate, Yellow Gold, 18k Gold, Gold

RUCHI Pink Sapphire, Black Agate and Diamond Rose Gold Pendant Necklace
By Ruchi New York
Located in New York, NY
18k Rose Gold Pink Sapphire - 0.68 Ct Agate- 1.71 Ct D-0.12 Ct All Diamonds are G-H/SI
Category

2010s Hong Kong Contemporary Pendant Necklaces

Materials

Agate, Diamond, Pink Sapphire, Gold, 18k Gold, Rose Gold

Ancient Hellenistic Necklace with Banded Agate and Gold-Charm Beads
Located in London, GB
natural polished garnet beads and a large central gold capped lozenge shaped banded agate. From the
Category

Antique 15th Century and Earlier Beaded Necklaces

Materials

Agate, Garnet, Gold, 18k Gold

Black Agate Onyx Ring with 18 Carat Yellow Gold, Cushion
Located in Kirschweiler, DE
This Black Agate Onyx Ring with 18 Carat Yellow Gold is totally handmade and cut of one piece
Category

2010s German Arts and Crafts Cocktail Rings

Materials

Onyx, Agate, Yellow Gold, 18k Gold, Gold

Victorian 18 Karat Gold Diamond and Bulls Eye Banded Agate Locket
Located in Glasgow, GB
An antique Victorian 18 carat yellow gold bulls-eye banded agate and diamond memorial locket. The
Category

Antique 1880s British Victorian More Jewelry

Materials

Agate, Diamond, 18k Gold, Gold

Victorian.46.67 Cttw. Agate, Ruby and Diamond Marquise Drop Dangle Earrings
Located in New York, NY
Approx. Diamond Wt.: 2.75 CT Approx. Agate Wt.: 39.22 CT Approx. Ruby Wt.: 4.7 CT Diamond Color: IJ, JK
Category

2010s Victorian Dangle Earrings

Materials

Agate, Diamond, Ruby, 18k Gold, Rhodium, Sterling Silver

64.54 Carats Green Agate and Diamond Circle Gold Pendant Necklace
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Agate 64.54Ct There are 0.68 Ct in Diamonds H SI The pendant comes with a 18K White Gold Chain. The
Category

21st Century and Contemporary Hong Kong Modern Drop Necklaces

Materials

Agate, Diamond, White Diamond, Gold, 18k Gold, White Gold

Green Agate , Diamonds, 18 Karat Rose and White Gold Tubogas Bracelet
Located in Marcianise, Marcianise (CE)
. Diamonds 0.52 ct Green Agate 2.93 ct Total Weigth 26.00 gr RF +ICHE K.GGUE Inner Diameter 5.7 cm For any
Category

Vintage 1970s Italian Retro Cuff Bracelets

Materials

Agate, Diamond, 18k Gold, Rose Gold, White Gold

Green and White Agate, Amethyst, 18 Karat Rose Gold Drop Retrò Earrings
Located in Marcianise, Marcianise (CE)
agate 15.80 g) and 14 ct of 2 amethyst spheres. Green and White Agate 15.80 g Amethyst 14 ct Length 8 cm
Category

Vintage 1970s Italian Retro Drop Earrings

Materials

Agate, Amethyst, 18k Gold, Rose Gold

3.84ct Vivid Blue Australian Boulder Opal Diamond & Agate Pendant Necklace 18K
Located in Suwanee, GA
PRODUCT Solid 18k Yellow Gold Australian Boulder Opal, 3.84 ct 6 Diamond: 0.031 Black Agate Metal Color
Category

2010s American Arts and Crafts Pendant Necklaces

Materials

Agate, Diamond, Opal, 18k Gold

Diamonds, Onyx, Coral, Green Agate, 18 Karat White Gold Dangle Earrings
Located in Marcianise, Marcianise (CE)
, ITEMS AT AUCTIONS AND ONGOING PROMOTIONS. Gorgeous dangle earrings mounted with a 18 karata white gold
Category

Vintage 1980s Italian Retro Dangle Earrings

Materials

Agate, Coral, Diamond, Onyx, 18k Gold, White Gold

Fashionable 18 Karat Pink Gold Statement Ring with White Agate and Diamonds
Located in Zurich, Zollstrasse
Timeless and elegant 18 K pink Gold Ring with a square white Agate surrounded by 56 brilliant cut
Category

2010s Italian Contemporary Fashion Rings

Materials

Agate, Diamond, Gold, 18k Gold, Rose Gold

Alex Soldier Carved Onyx, Agate, Mother of Pearl, Topaz Convertible Earrings
By Alex Soldier
Located in New York, NY
light, kindness and beauty. These stunning earrings feature hand-carved black onyx, white agate, mother
Category

2010s American Contemporary Drop Earrings

Materials

Topaz, Pearl, Onyx, Multi-gemstone, Agate, Yellow Gold, 18k Gold, Gold

Pink Green Tourmaline White Agate 18 Kt Gold Made in Italy Cufflinks
By Margherita Burgener
Located in Valenza , IT
total grams 8.89 n. 2 white agate total grams 2.90 n. 1 round pink tourmaline ct 0.29 n. 1 round green
Category

21st Century and Contemporary Italian Contemporary Cufflinks

Materials

Agate, Tourmaline, 18k Gold, White Gold, Gold

Coral, Diamonds, Sapphires, Onyx, Agate, Platinum and 18 Kt White Gold Brooch.
Located in Marcianise, Marcianise (CE)
Sapphires 5.73 ct Onyx and Green Agate 1.00 gr Coral 2.80 gr Total Weight 18.80 gr RF +CFCR For any
Category

Vintage 1960s Italian Retro Brooches

Materials

Agate, Coral, Diamond, Onyx, Sapphire, 18k Gold, White Gold, Platinum

Alex Soldier Carved Onyx, Agate, Mother of Pearl, Topaz Convertible Earrings
By Alex Soldier
Located in New York, NY
light, kindness and beauty. These stunning earrings feature hand-carved black onyx, white agate, mother
Category

2010s Contemporary Drop Earrings

Materials

Topaz, Agate, Pearl, Onyx, Multi-gemstone, Yellow Gold, 18k Gold, Gold

21.80 g Blue and Black Striated Agate, 0.98 Carat Rubies, 18 Karat Gold Bracelet
Located in Marcianise, Marcianise (CE)
ct Blue and Black Striated Agate 21.80 g Diameter: 17/18 mm Length 20/21 mm Total Weight 40.60 g
Category

Vintage 1960s Retro Link Bracelets

Materials

Agate, Ruby, 18k Gold, Yellow Gold

Amethysts , Engraved Red Coral Drops, White Agate Rings, 18K Rose Gold Earrings
Located in Marcianise, Marcianise (CE)
white agate. White Agate gr 0.60 Amethyst ct 14.00 Coral gr 9.60 Tot.Weight gr 24.40 R.F ogae For any
Category

Vintage 1980s Italian Retro Drop Earrings

Materials

Agate, Amethyst, Coral, 18k Gold, Rose Gold

Solid Opal Black Agate Halo Diamond Engagement Ring 18K Yellow Gold
Located in Suwanee, GA
Australian Solid Opal Black Agate Halo Diamond Engagement Wedding Ring 18K Yellow Gold. Free
Category

2010s American Arts and Crafts Engagement Rings

Materials

Agate, Diamond, Opal, 18k Gold, Yellow Gold

18kt Pink Gold Ring With 5.9 ct Agate Stone and 3.8 ct White & Cognac Brilliant
Located in Antwerp, BE
Gorgeous and Elegant 18kt Pink Gold Ring With 5.9 ct Agate Stone and 3.8 ct White & Cognac
Category

21st Century and Contemporary Italian Artisan Cocktail Rings

Materials

Agate, Gold, 18k Gold

Diamonds, Emeralds, Green Agate, White Coral 18 Karat White Gold Dangle Earrings
Located in Marcianise, Marcianise (CE)
conditions. Diamonds 0.44 ct Emeralds 0.27 ct Green Agate 6.20 gr Coral 3.70 gr Total Weight 13.70 gr RF
Category

Vintage 1960s Italian Retro Dangle Earrings

Materials

Agate, Coral, Diamond, Emerald, 18k Gold, White Gold

Stephen Webster Forget Me Not 18 Carat Gold Diamond and Green Agate Necklace
By Stephen Webster
Located in Bishop's Stortford, Hertfordshire
This pendant by Stephen Webster is from his Forget me Not collection and features a green agate
Category

21st Century and Contemporary British Pendant Necklaces

Materials

Agate, Diamond, Black Diamond, White Gold

Paul Eaton Sculpted Poodle Heads with Blue Lace Agate Drop Silver Stud Earrings
Located in Charleston, SC
into stud earrings with blue lace agate drops (.63" x 1"). These bespoke miniature dog sculptures of a
Category

2010s British Contemporary Drop Earrings

Materials

Agate, Silver, Sterling Silver

Unique Semi Black Opal & Diamond Black Agate Engagement Ring 18K Yellow Gold
Located in Suwanee, GA
. ---------------------------------------------------------------------------------------------------- ABOUT THIS PRODUCT 18K Yellow Gold Australian Semi Black Opal, 0.42 ct 10 Dia...
Category

2010s American Arts and Crafts Engagement Rings

Materials

Agate, Diamond, Opal, Black Opal, Yellow Gold

Agate Topaz Diamond South Sea Pearl Drop Earrings 3.71 Carat 18 Karat White Gold
By Harbor Diamonds
Located in New York, NY
18K White Gold drop earrings featuring two South Sea Pearls, 13-14mm, agate and blue topaz with a
Category

2010s American Contemporary Drop Earrings

Materials

Agate, Diamond, South Sea Pearl, Topaz, White Gold

Vintage White Agate and Onyx Cocktail Ring set with Diamonds in White Gold
Located in Porto, PT
A Vintage White Agate and Onyx Cocktail Ring set in White Gold with 20 Diamonds weighing 0,21 ct
Category

20th Century Italian Contemporary Cocktail Rings

Materials

Agate, Diamond, White Diamond, Onyx, 18k Gold, White Gold, Gold

RUCHI Pink Sapphire and Black Agate U-Shape Rose Gold Dangle Earrings
By Ruchi New York
Located in New York, NY
18k Rose Gold Pink Sapphire - 4.30 Ct Agate - 3.63 Ct D- 0.33 Ct All Diamonds are G-H/SI
Category

2010s Hong Kong Contemporary Dangle Earrings

Materials

Diamond, Pink Sapphire, Gold, 18k Gold, Rose Gold

Handcrafted Retro Earrings Amethyst, White Stones, 18 Karat Yellow Gold
Located in Marcianise, Marcianise (CE)
condition. White Stones and Green Agate 11.9 g Amethyst 14 ct Total weight 20.3 g length 6 cm RF + GHHF For
Category

Vintage 1980s Retro Dangle Earrings

Materials

Agate, Amethyst, Gold, 18k Gold, Yellow Gold

Hera Cameo Brooch with Sardonyx, Natural Pearl and Gold, Circa 1890
Located in London, GB
back, which appears to contain woven hair. With French eagle marks for 18ct gold and a maker's mark
Category

Antique Late 19th Century French Late Victorian Brooches

Materials

Agate, Natural Pearl, 18k Gold

Fabergé "Autumn"-Egg Object, 18k Yellow Gold, translucent Enamel, 3.34ct G VS
By Fabergé
Located in Pforzheim, DE
Fabergé "Autumn"-Egg Objet, 18k Yellow Gold, Diamonds 3.34ct G VS This Fabergé egg is part of the
Category

1990s German Edwardian Enamel Frames and Objects

Materials

Agate, Amber, Coral, Diamond, Emerald, Ruby, 18k Gold, Yellow Gold, Enamel

Fei Liu Garnet, Diamond and Citrine 18 Karat Yellow Gold Stacking Ring
By Fei Liu
Located in Birmingham, GB
featuring Mandarin garnets, diamonds and citrines set in textured 18ct yellow gold. - Size: M (UK) / 6.5
Category

21st Century and Contemporary British Contemporary Fashion Rings

Materials

Garnet, White Diamond, Diamond, Citrine, Agate, Yellow Gold, 18k Gold, Gold

Pomellato Nudo Sky Blue Ladies Ring A.B904O6OYTTP
By Pomellato
Located in Wilmington, DE
rose and white gold. 1 sky blue topaz, 1 agate 10 ct, 38 thermal topaz 0.5 ct. Ring Size 52
Category

2010s Cocktail Rings

Sylvie Lambert Vintage 18 kt gold ring with 4 resin rings
Located in AMSTERDAM, NL
" - Sylvie Lambert Includes the 18ct gold French stamped ring with 4 resin rings in imitation of onyx, agate
Category

Vintage 1970s French Rococo Fashion Rings

Materials

Gold, 18k Gold

Sacchi Lapis Lazuli Sphinx Drop Earrings 18 Karat Satin Yellow Gold
By Sacchi Gioielli
Located in Rome, IT
agate stones gives characteristic light effects. The Earrings are comprised of 18 Karat Yellow Gold
Category

21st Century and Contemporary Italian Egyptian Revival Drop Earrings

Materials

Diamond, White Diamond, Lapis Lazuli, 18k Gold, Yellow Gold

Sacchi Light Green Jade Flower Drop Earrings 18 Karat Satin Yellow Gold
By Sacchi Gioielli
Located in Rome, IT
, and polishing with agate stones gives characteristic light effects. The Earrings are comprised of 18
Category

21st Century and Contemporary Italian Classical Roman Drop Earrings

Materials

Diamond, White Diamond, Jade, 18k Gold, Yellow Gold

  • 1
Get Updated with New Arrivals
Save "18ct Agate", and we’ll notify you when there are new listings in this category.

18ct Agate For Sale on 1stDibs

Surely you’ll find the exact 18ct agate you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of Gold, 18k Gold and Yellow Gold, this item was constructed with great care. You can easily find a 7 antique edition and 14 modern creations to choose from as well. If you’re looking for a 18ct agate from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 19th Century while another version may have been produced as recently as the 21st Century. Finding an appealing 18ct agate — no matter the origin — is easy, but Tessa Packard, Stephen Webster and LB Exclusive each produced a popular version that is worth a look. A round cut version of this piece has appeal, but there are also oval cut and brilliant cut versions for sale. Most of our 18ct agate for sale are for women, but there are 9 pieces available to browse for men.

How Much is a 18ct Agate?

Prices for a 18ct agate can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $379 and can go as high as $17,285, while this accessory, on average, fetches $1,813.