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Opal Diamond 18k

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Opal Diamond 18K Drop Earrings
Located in North Hollywood, CA
These beautiful Opal Diamond drop earrings are made in 18K Yellow Gold. There are 3 Opals per
Category

Early 2000s English Modern Drop Earrings

Materials

Diamond, Opal, 18k Gold

Opal Diamond 18K Drop Earrings
Opal Diamond 18K Drop Earrings
Free Shipping
L 1.78 in
Opal Diamond 18 K Pendant Clip
Located in Bad Kissingen, DE
18 k yellow gold hallmarked 750 6,84 ct opal 0,90 ct diamonds weight 9,6 gram size 40 x 20 mm
Category

21st Century and Contemporary German Pendant Necklaces

Materials

18k Gold

Opal Diamond 18 K Pendant Clip
Opal Diamond 18 K Pendant Clip
Free Shipping
W 0.79 in L 1.58 in
IGI Certified 33.17ct Fine White Opal & Diamond 18k Yellow Gold Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Top Grade Round Cabochon White Opal & Diamond 18k Yellow Gold Pendant Necklace. Large 33.17 Carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, Diamond, White Diamond, Gold, 18k Gold, Yellow Gold

Opal & diamond 18K white gold ring
Located in Surfside, FL
Oval Opal & diamonds ring in 18K white gold. Round brilliant cut diamonds total approx. weight
Category

21st Century and Contemporary Fashion Rings

Materials

18k Gold, White Gold

20 Carat Australian Coober Pedy Opal & Diamond 18k Yellow Gold Pendant Necklace
By Gems and Jewels UK
Located in Birmingham, GB
Fine Natural Australian Coober Pedy Opal & Diamond 18k Yellow Gold Pendant Necklace. Large 20
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Opal, Black Opal, Fire Opal, Gold, 18k Gold, Yel...

Victorian Navette Diamond Opal Diamond 18K Ring
Located in Scotts Valley, CA
Details: Fabulous Victorian Navette opal and diamond ring set in 18K subtle rose gold. The band has
Category

Antique Late 19th Century European Victorian Cluster Rings

Materials

Diamond, Opal, Rose Gold, 18k Gold

5.82ct Black Boulder Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
pendant setting. 18K solid gold and high jewellery grade diamonds add to the collectors status of this
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, Black Opal, 18k Gold

Australian 2.20ct Black Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
The bright opal in this piece is simply stunning. Surrounded by high jewellery grade diamonds and
Category

21st Century and Contemporary Australian Art Deco Pendant Necklaces

Materials

Diamond, Opal, Black Opal, 18k Gold

Australian 1.84ct Black Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
A beautiful flagstone pattern solid Australian Black Opal set in solid 18K gold and accented with
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold

Australian 5.28ct Dark Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
piece. Set in 18K solid gold, it is an investment that will last a lifetime. SPECIFICATIONS Opal Type
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, 18k Gold

Australian 2.04ct Black Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
sparkling white, high jewellery grade, diamond completes this work of art. SPECIFICATIONS Opal Type: Black
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold

Australian 10.38ct Boulder Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
brilliant white diamonds and set in 18K gold. Viewings can be arranged virtually via our online concierge
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold

Australian 2.63ct Black Opal, Diamond, 18k Gold Ring
Located in MAIN BEACH, QLD
brilliant white diamonds sparkle in the light, reflecting in the high polish of the opal like stars meeting
Category

21st Century and Contemporary Australian Engagement Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, White Gold

Australian Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
statement piece. Solid 18K gold with platinum accents and high jewellery grade diamonds. SPECIFICATIONS
Category

Late 20th Century Australian Art Deco Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 0.94ct Boulder Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
opal that would make any of the outback opal hunters envious, set in 18K solid gold and with the
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, 18k Gold

Australian 13.77ct Dark Opal, Diamond & 18K Gold Earrings
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Dark Opal Opal Weight: 13.77ct Diamonds: 0.08ct D IF - F VVS Metals: 18K
Category

2010s Australian Art Deco Dangle Earrings

Materials

Diamond, Opal, 18k Gold

Australian 13.77ct Dark Opal, Diamond & 18K Gold Earrings
Australian 13.77ct Dark Opal, Diamond & 18K Gold Earrings
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H 1.82 in W 0.47 in D 0.19 in
Australian 1.35ct Crystal Opal, Diamond, 18K Gold Ring
Located in MAIN BEACH, QLD
, Australia Diamonds: 0.27ct D IF - F VVS Metals: 18K solid Gold Ring Size: Resized to fit you perfectly. THE
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold

Australian 3.36ct Crystal Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
Crystal Opal Opal Weight: 3.36ct Opal Origin: Lightning Ridge, NSW, Australia Diamonds: 0.15ct D IF - F
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold

Australian 6.39ct Light Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
sparkling white high jewellery grade diamonds and set in 18K solid gold, this ring is for a lifetime
Category

Late 20th Century Australian Art Deco Cocktail Rings

Materials

Diamond, Opal, 18k Gold

Fine Estate Mario Buccellati Cabochon Opal Diamond 18K Two Color Gold Earrings
By Mario Buccellati
Located in New York, NY
Stunning and substantial estate Mario Buccellati cabochon opal diamond 18K yellow and patinated
Category

20th Century Italian Renaissance Clip-on Earrings

Materials

Opal, Diamond, Gold, 18k Gold, White Gold, Yellow Gold

Australian 2.25 Carat Black Opal, Diamond & 18k Gold Earrings
Located in MAIN BEACH, QLD
Diamonds: 0.18ct D IF - F VVS Metals: 18K solid Gold THE GRYFFIN OPAL DIFFERENCE By investing in solid
Category

2010s Australian Dangle Earrings

Materials

Diamond, Opal, Black Opal, 18k Gold

Australian 2.25 Carat Black Opal, Diamond & 18k Gold Earrings
Australian 2.25 Carat Black Opal, Diamond & 18k Gold Earrings
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H 1.2 in W 0.45 in D 0.13 in
1.44 Carat Australian Black Opal, Diamond & 18k Gold Earrings
Located in MAIN BEACH, QLD
These lovely black opal and diamond screw-back earrings are just adorable. Elegance mixed with
Category

2010s Australian Clip-on Earrings

Materials

Diamond, Opal, Black Opal, Platinum, 18k Gold

Australian 1.54ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
in 18K gold and with over 1.2ct of high jewellery grade brilliant white diamonds, this is a ring fit
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 2.43ct Black Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
holds a freeform shaped black opal surrounded in 18K yellow gold and high jewellery grade brilliant
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 2.60ct Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
. Surrounded in 18K solid gold and 7 high jewellery grade brilliant white diamonds, it's a piece you just
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 3.00ct Boulder Opal, Diamond, 18K Gold & Platinum Bracelet
Located in MAIN BEACH, QLD
opal and high jewellery grade diamonds. Set in 18K solid gold, this is not just wearable art with rare
Category

Late 20th Century Australian Bangles

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 3.29ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
. SPECIFICATIONS Opal Type: Black Opal Opal Weight: 3.29ct Opal Origin: Lightning Ridge, NSW, Australia Diamonds
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Black Opal, Diamond, Opal, Platinum, 18k Gold

Australian 16.04ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
the mysterious outback of Australia, surrounded by brilliant white diamonds in a platinum and 18K
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 4.02ct Crystal Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
amazing opal and set it in this solid 18K gold ring and surround it with high jewellery grade brilliant
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, Platinum, 18k Gold

Australian 1.35ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
Weight: 1.35ct Opal Origin: Lightning Ridge, NSW, Australia Diamonds: 0.17ct D IF - F VVS Metals: 18K
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 2.71ct Crystal Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
: 2.71ct Opal Origin: Coober Pedy, SA, Australia Diamonds: 0.36ct D IF - F VVS Metals: 18K solid Gold
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, Platinum

Australian 1.45ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
stone and fits perfectly with the bespoke 18K solid gold and platinum ring with brilliant white diamonds
Category

Late 20th Century Australian Modern Cocktail Rings

Materials

Diamond, Opal, Black Opal, Platinum, 18k Gold

Australian 1.85ct Black Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
. Timeless beauty showcasing the magnificence of solid Australian Black Opal, sparkling white diamond
Category

21st Century and Contemporary Australian Art Deco Cocktail Rings

Materials

Diamond, Opal, Black Opal, Platinum, 18k Gold

Australian 19.06ct Boulder Opal, Diamond, 18k Gold & Platinum Bracelet
Located in MAIN BEACH, QLD
diamonds, but it also features a stunning blue boulder opal with the colours of a tropical sea. An amazing
Category

1990s Australian Bangles

Materials

Diamond, Opal, 18k Gold, Platinum

Australian 23.00ct Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
, this is a very large, gem-grade opal featuring deep vivid blues and greens, set in 18K gold and
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Platinum

Carved White Opal Diamond 18K Yellow Gold Drop Earrings
By Valentin Magro
Located in New York, NY
The soft iridescent light of white opal illuminates these earrings. 18k yellow gold lever backs
Category

2010s American Lever-Back Earrings

Materials

Diamond, White Diamond, Opal, Gold, 18k Gold, Yellow Gold

Australian 5.71ct Light Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
opal and will be adored. Set in 18K solid gold with brushed platinum and high jewellery grade diamonds
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold, Platinum

Australian 8.24ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
Weight: 8.24ct Opal Origin: Winton, QLD, Australia Diamonds: 0.19ct D IF - F VVS Metals: 18K Solid Gold
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Opal, Diamond, 18k Gold, Platinum

Australian 8.03ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
Diamonds: 0.095ct D IF - F VVS Metals: 18K solid Gold, Platinum Ring Size: Resized to fit you perfectly
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold, Platinum

Australian 5.65ct Black Opal, Diamond & 18k White Gold Necklace
Located in MAIN BEACH, QLD
bail ball encrusted with 25 brilliant white diamonds, all set in our signature solid 18K white gold
Category

21st Century and Contemporary Australian Pendant Necklaces

Materials

Diamond, Opal, Black Opal, White Gold

Australian 5.65ct Black Opal, Diamond & 18k White Gold Necklace
Australian 5.65ct Black Opal, Diamond & 18k White Gold Necklace
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W 0.96 in D 0.34 in L 0.86 in
Australian 6.35ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
. Surrounded with high jewellery grade brilliant white diamonds and set in solid 18K gold, this is an everyday
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold, Platinum

Australian 6.95ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
: 6.95ct Opal Origin: Winton, QLD, Australia Diamonds: 0.22ct D IF - F VVS Metals: 18K solid Gold, Platinum
Category

Late 20th Century Australian Cocktail Rings

Materials

Diamond, Opal, Platinum, 18k Gold

Australian 1.25ct Black Opal, Diamond, 18k Yellow & White Gold Ring
Located in MAIN BEACH, QLD
. SPECIFICATIONS Opal Type: Black Opal Opal Weight: 1.25ct Opal Origin: Lightning Ridge, NSW, Australia Diamonds
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Black Opal, Opal, Diamond, White Gold, 18k Gold

Australian 0.75ct Black Opal, Diamond, 18k Yellow & White Gold Ring
Located in MAIN BEACH, QLD
made of solid 18K white gold and is encrusted with 34 brilliant white diamonds. The outer rings are
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, Black Opal, 18k Gold, White Gold

6.17 Carat Australian Black Opal Diamond 18k White Gold Pendant
Located in Beverly Hills, CA
carats of round brilliant-cut diamonds which add brilliance and sparkle to the piece. Made in 18k white
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, Opal, Black Opal, 18k Gold, White Gold

Australian 12.94ct Black Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
Opal Origin: Winton, QLD, Australia Diamonds: 0.26ct D IF - F VVS Metals: 18K solid Gold, Platinum Ring
Category

Late 20th Century Australian Art Deco Cocktail Rings

Materials

Diamond, Opal, Black Opal, Platinum, 18k Gold

Australian 6.10ct Black Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
of 18K solid gold and high jewellery grade diamonds, this is an investment piece like no other. You
Category

21st Century and Contemporary Australian Choker Necklaces

Materials

Diamond, Opal, 18k Gold, Platinum

Australian 9.18ct Boulder Opal, Diamond, 18K Gold and Platinum Ring
Located in MAIN BEACH, QLD
. A stunning multi-patterned Black Boulder Opal, encrusted pavé set brilliant white diamonds, 18K
Category

21st Century and Contemporary Australian Cocktail Rings

Materials

Diamond, Opal, 18k Gold, Platinum

Edwardian French Black Opal & Diamond 18k Yellow Gold & Platinum Ring
Located in MIAMI, FL
diamonds. Golden wire work forms a bridge that makes the opal stand out in the design. The top half of the
Category

Early 20th Century French Edwardian Cocktail Rings

Materials

Diamond, Opal, Black Opal, Yellow Gold, Platinum

3.50ct Oval Australian Solid Opal & Diamond 18K White Gold Cocktail Ring
Located in MELBOURNE, AU
Performed in 18K White Gold, the ring is centrally set with a magnificent Australian Solid Opal
Category

Vintage 1970s Australian Retro Cocktail Rings

Materials

Diamond, Opal, White Gold, 18k Gold

Dior Rose Des Vents Pink Opal Diamond 18k Rose Gold Bracelet
By Christian Dior
Located in Dubai, Al Qouz 2
sparkling diamond on a circular pink Opal medallion. The medallion is surrounded by gold beads and held by a
Category

2010s Italian Chain Bracelets

Materials

Diamond, Opal, Rose Gold

Meghna Jewels 14.19 carat Fire Opal Diamond 18k Yellow Gold Diamond Ring
By Meghna Jewels
Located in Hoffman Estate, IL
This ring has been meticulously crafted from 18-karat gold, 14.19 carat fire opal and handset with
Category

21st Century and Contemporary Unknown Modern Cocktail Rings

Materials

Diamond, Fire Opal, Gold, 18k Gold, Yellow Gold

Estate Faceted Black Pearl, Black Opal, Diamond 18K Gold Platinum Cocktail Ring
Located in New York, NY
approximately 13.4mm Diamonds weighing a total of .40 carats Size 6.5 Total weight 19.1 grams Marks: 18K, Plat
Category

20th Century Cocktail Rings

Materials

Diamond, Opal, Black Pearl, Black Opal, 18k Gold, Platinum, Yellow Gold

Vintage 1960s 1.65 Carat Cabochon Cut Opal Diamond 18k White Gold Pendant
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive 1.65 carat white opal and 0.68 carat diamond, 18 karat white gold pendant
Category

Vintage 1960s Unknown Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, White Gold

Multi Color Opal & Diamond Bracelet
Located in New York, NY
Opal & Diamond 18k Gold Bracelet Features 109 Opal stones in multiple vibrant colors totaling
Category

Early 2000s Unknown Cuff Bracelets

Materials

Diamond, Opal, 18k Gold

Natural Australian 7.43ct Boulder Opal and Diamond Cocktail Ring 18k Yellow Gold
By Opal Minded
Located in Sydney, AU
) Setting length: 67.37mm Metal: 18K Yellow Gold This opal ring arrives in a gun-metal aluminium box
Category

2010s Australian Contemporary Cocktail Rings

Materials

Opal, Black Opal, Diamond, Gold, 18k Gold, Yellow Gold

Natural Australian 10.97ct Black Opal and Diamonds Cocktail Ring 18K Yellow Gold
By Opal Minded
Located in Sydney, AU
: 22.72mm Setting width: 15.92mm Metal: 18K Yellow Gold This opal ring arrives in a gun-metal aluminium
Category

2010s Australian Contemporary Cocktail Rings

Materials

Diamond, Opal, Black Opal, Gold, 18k Gold, Yellow Gold

18k Gold Opal Diamond Brooch
Located in Montreal, QC
18k yellow gold , opal gemstone and 15 genuine diamond brooch. Unmarked, tested 18k, 40mm long x
Category

Vintage 1950s Unknown Brooches

Materials

Diamond, Opal, 18k Gold

18k Gold Opal Diamond Brooch
18k Gold Opal Diamond Brooch
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W 1.3 in L 1.58 in
18K Opal Diamond Halo Ring
By Rose and Choc
Located in Wallingford, CT
Oval Australian opal set in diamonds Metal: 18K Yellow Gold Stone: Australian Opal Stone Shape
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Opal, 18k Gold

Jelly Opal Diamond Drop Earrings 18K
Located in North Hollywood, CA
. These Opals have a Diamond surround on both the round Opal and the Pear Opal. The round Opal has a
Category

Vintage 1960s English Modernist Drop Earrings

Materials

Diamond, Opal, 18k Gold

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Opal Diamond 18k For Sale on 1stDibs

You are likely to find exactly the opal diamond 18k you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and Yellow Gold — can elevate any look. Our collection of these items for sale includes 1054 vintage editions and 1702 modern creations to choose from as well. You’re likely to find the perfect opal diamond 18k 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. For this particular piece, .5 Carat and 1 Carat are consistently popular carat weights. There have been many well-made iterations of the classic opal diamond 18k over the years, but those made by Meghna Jewels, Renata Bernard and Goshwara are often thought to be among the most beautiful. A cabochon version of this piece has appeal, but there are also round cut and oval cut versions for sale. Most of our opal diamond 18k for sale are for women, but there are 581 pieces available to browse for men.

How Much is a Opal Diamond 18k?

On average, an opal diamond 18k at 1stDibs sells for $5,112, while they’re typically $212 on the low end and $385,000 for the highest priced versions of this item.
Questions About Opal Diamond 18k
  • 1stDibs ExpertNovember 21, 2023
    Whether a wedding band should be 14K or 18K depends on your personal preferences. Because it contains more pure gold, 18-karat gold will usually show off a richer color and be less likely to fade over time. On the other hand, 14-karat gold is less prone to scratching and damage because it has more alloy metals. Explore a large collection of gold wedding bands on 1stDibs.
  • 1stDibs ExpertNovember 14, 2023
    Yes, 18-karat gold can be good for earrings. Because it is an alloy, 18-karat gold is more durable and scratch-resistant than pure 24-karat gold. You can find 18-karat gold in rich warm yellow, cooler white with warm undertones and light pink rose. On 1stDibs, explore a large collection of gold earrings.
  • 1stDibs ExpertNovember 1, 2023
    The difference between 14K and 18K white gold stud earrings comes down to the content of the precious metal alloy. Stud earrings made of 14-karat white gold are 58.3% gold and 41.7% base metal, while 18-karat gold is 75% pure gold and 25% other metals. As a result, 14-karat white gold tends to be stronger and more resistant to scratching, and 18-karat gold will have a more noticeable warm-glowing yellow tinge. On 1stDibs, shop a range of white gold stud earrings.