18k Boulder Opal
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Natural Australian 7.43ct Boulder Opal and Diamond Cocktail Ring 18k Yellow Gold
By Opal Minded
Located in Sydney, AU
The impressive and opulent Ta Prohm boulder opal ring (7.43ct) is a piece that carries the ancient
Category
2010s Australian Contemporary Cocktail Rings
Materials
Opal, Black Opal, Diamond, Gold, 18k Gold, Yellow Gold
Natural Untreated Australian 8.72ct Boulder Opal Earrings in 18 K Yellow Gold
By Renata Bernard
Located in Sydney, AU
“Waltz of the Flowers” opal earrings present gorgeously colourful Winton boulder opals (8.72ct
Category
2010s Australian Contemporary Dangle Earrings
Materials
Opal, 18k Gold, Yellow Gold
Free Shipping
H 1.61 in W 0.48 in
5.82ct Black Boulder Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
What an amazing black boulder opal we have here. Bright reds, greens and blues in this bespoke
Category
21st Century and Contemporary Australian Pendant Necklaces
Materials
Diamond, Opal, Black Opal, 18k Gold
18k Gold Short Necklace with Opal Beads Australian Boulder Opal Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
dark opal beads. The iridescent stripe across the boulder opal shows plenty "play of color", the highly
Category
2010s Dutch Artisan Beaded Necklaces
Materials
Opal, Black Opal, 18k Gold
Free Shipping
W 0.43 in L 16.54 in
Australian 61.79 Crat Boulder Opal & 18k Gold Necklace
Located in MAIN BEACH, QLD
.
SPECIFICATIONS
Opal Type: Black Boulder Opal
Opal Weight: 61.79ct
Opal Origin: Winton, QLD, Australia
Metals: 18K
Category
2010s Australian Pendant Necklaces
Materials
Opal, 18k Gold
16.92 Carat Australian Boulder Opal & 18k Gold Earrings
Located in MAIN BEACH, QLD
gold earrings with amazing vivid-coloured boulder opal. Get ready to talk about these a lot, everyone
Category
2010s Australian Dangle Earrings
Materials
Opal, 18k Gold
Australian 8.01ct Boulder Opal, Emerald & 18K Gold Brooch
Located in MAIN BEACH, QLD
from solid 18K gold with gorgeous blue-green boulder opal back and green emeralds for eyes. A timeless
Category
Late 20th Century Australian Brooches
Materials
Opal, Emerald, Black Opal, Diamond, 18k Gold
16.47 Carat Australian Boulder Opal & 18k Gold Earrings
Located in MAIN BEACH, QLD
18K solid gold as they deserve no less.
SPECIFICATIONS
Opal Type: natural solid Australian Boulder
Category
2010s Australian Dangle Earrings
Materials
Opal, 18k Gold
18k Gold Australian Boulder Opal and Peridot Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
A stylish and intriguing 18k gold pendant with a natural Australian boulder opal and a brilliant
Category
2010s Dutch Artisan Pendant Necklaces
Materials
Opal, Peridot, 18k Gold
18k Gold Australian Boulder Opal and Amethyst Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
A stylish and intriguing 18k gold pendant with a natural Australian boulder opal and a brilliant
Category
2010s Dutch Artisan Pendant Necklaces
Materials
Amethyst, Opal, 18k Gold
18k Gold Australian Boulder Opal and Diamond Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
A stylish and intriguing 18k gold pendant with a natural Australian boulder opal and a Bolshevik
Category
2010s Dutch Artisan Pendant Necklaces
Materials
Diamond, Opal, 18k Gold
18k Yellow Gold Pipe Boulder Opal Ring
By Llyn strong
Located in Greenville, SC
An 18k Yellow Gold ring with a bezel set 8 carat pipe-variety boulder opal. This ring was designed
Category
2010s American Contemporary Cocktail Rings
Materials
Opal, Yellow Gold
Australian 10.38ct Boulder Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
This amazing boulder opal is the best gem opal we have ever had in a ring. It has outstanding
Category
Late 20th Century Australian Cocktail Rings
Materials
Diamond, Opal, 18k Gold
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
18K Yellow Gold Australian Boulder Opal Diamond Earrings
By Thomas Laine LLC
Located in New York City, NY
Stunning One of A Kind 18k Yellow Gold Australian Boulder Opal Diamond Earrings.
Hand Selected
Category
21st Century and Contemporary American Contemporary Lever-Back Earrings
Materials
Diamond, Opal, 18k Gold, Yellow Gold
Lady's Boulder Opal Broach in 18k Yellow Gold
Located in New York, NY
One lady's boulder black opal in a multi-color fire color. Vivid saturation scale with flash fire
Category
Vintage 1970s American Art Deco Brooches
Materials
Opal, 18k Gold, Yellow Gold
Australian 21.86ct Boulder Opal, Diamond, Platinum & 18K Gold Necklace
Located in MAIN BEACH, QLD
This stunning piece is a very unique solid Australian Boulder Opal. Deep mysterious blues and
Category
Late 20th Century 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
-green Boulder Opal with flicks of orange and gold and hints of purple this stone is truly a gem
Category
21st Century and Contemporary Australian Pendant Necklaces
Materials
Diamond, Opal, Black Opal, 18k Gold, Platinum
18k Gold Short Pink Boulder Opal and Diamond Necklace
By Angelina Fine Jewelry
Located in Amsterdam, NH
A feminine, elegant and understated 18k gold short necklace with a soft pink Australian boulder
Category
2010s Dutch Artisan Pendant Necklaces
Materials
Opal, Diamond, 18k Gold
Steven Battelle 11.3 Carats Boulder Opal 18K Gold Ring
By Steven Battelle
Located in Soquel, CA
A bright, electric blue, variegated 12 x 27 mm oval boulder opal is set vertically in an
Category
21st Century and Contemporary Balinese Contemporary Cocktail Rings
Materials
Opal, 18k Gold
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
Precious White Opal & Boulder Opal "Heartbreak" Earrings in 18K Gold w Diamonds
By Eytan Brandes
Located in Sherman Oaks, CA
grams
Butterfly backs in 18 karat gold are included.
NOTE: One of the boulder opals has a hairline
Category
2010s American Contemporary Dangle Earrings
Materials
Diamond, Opal, Black Opal, Gold, 18k Gold, Yellow Gold
Free Shipping
W 0.43 in D 0.12 in L 1.77 in
Australian 23.00ct Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
Australian opal in all its exquisite beauty. This boulder opal is a true heirloom gem. At 23ct
Category
21st Century and Contemporary Australian Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, Platinum
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 Boulder Opal, Pink Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
. With its truly amazing Black Boulder Opal of over 50ct from the Queensland outback, to its Pink and
Category
21st Century and Contemporary Australian Pendant Necklaces
Materials
Pink Diamond, Opal, 18k Gold, Platinum
Australian 8.24ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
A once-in-a-lifetime gem, this magical boulder opal is beyond belief. The colours are very vivid
Category
21st Century and Contemporary Australian Cocktail Rings
Materials
Opal, Diamond, 18k Gold, Platinum
Platinum Boulder Opal and Diamond Ring with 18K Accent
Located in Addison, TX
Behold the exquisite elegance of the Platinum Boulder Opal and Diamond Ring, a mesmerizing piece
Category
20th Century Engagement Rings
Materials
White Diamond, Opal, Gold, 18k Gold, Platinum
Australian 8.03ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
SPECIFICATIONS
Opal Type: Boulder Opal
Opal Weight: 8.03ct
Opal Origin: Winton, QLD, Australia
Category
21st Century and Contemporary Australian Cocktail Rings
Materials
Diamond, Opal, 18k Gold, Platinum
Australian 6.35ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
beautiful boulder opal that will bring you back to a tropical holiday every time you look upon it
Category
Late 20th Century Australian Cocktail Rings
Materials
Diamond, Opal, 18k Gold, Platinum
33.53ct Australian Boulder Opal Pendant Brooch Combo 18K Gold V1127
Located in Osprey, FL
Adorn yourself with this magnificent 33.53ct Australian Boulder Opal pendant brooch combo! This
Category
2010s American Pendant Necklaces
Materials
Opal, 18k Gold
Free Shipping
H 0.47 in W 1 in L 2.04 in
Boulder Opal Yellow Gold Earrings
Located in Los Angeles, CA
.
SPECIFICATIONS:
OPALS: 2 freeform cushion-shaped boulder opals total approximately 10 carats.
METAL: 18k
Category
1990s Contemporary Clip-on Earrings
Materials
Opal, 18k Gold, Yellow Gold
Australian 6.95ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
in platinum to bring out their luminance.
SPECIFICATIONS
Opal Type: Black Boulder Opal
Opal Weight
Category
Late 20th Century Australian Cocktail Rings
Materials
Diamond, Opal, Platinum, 18k Gold
Steven Battelle 27.3 Carats Koroit Boulder Opal 18K Gold Pendant
By Steven Battelle
Located in Soquel, CA
A nice 18 x 29 mm oval harlequin Koroit boulder opal with nearly every rainbow color displayed is
Category
21st Century and Contemporary Balinese Contemporary Pendant Necklaces
Materials
Opal, 18k Gold
Boulder Opal Diamond Gold Ring
Located in Beverly Hills, CA
A magnificent ring featuring a 14.15 carat boulder opal bezel with exceptional play of color. The
Category
21st Century and Contemporary Fashion Rings
Materials
Diamond, White Diamond, Opal, 18k Gold, Yellow Gold
Steven Battelle 33.4 Carats Australian Boulder Opal 18K Gold Bracelet
By Steven Battelle
Located in Soquel, CA
Seven irregular cut cabochons of shimmering blueish and purplish Australian boulder opal from the
Category
21st Century and Contemporary Balinese Modern Bracelets
Materials
Opal, 18k Gold
Boulder Opal 18K Gold Silver Ring Natural Blue opal gemstone gift for wife
Located in Berlin, DE
Matte finish silver 18K gold plated ring with fine quality blue Boulder Opal
gemstone origin
Category
2010s German Artist Cocktail Rings
Materials
Opal, Gold Plate, Silver, 18k Gold
Australian 12.94ct Black Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
beautiful. Dress to impress; Black Boulder Opal set in solid 18K gold and platinum, accented by stunning
Category
Late 20th Century Australian Art Deco Cocktail Rings
Materials
Diamond, Opal, Black Opal, Platinum, 18k Gold
Australian Boulder Opal Feather Style Pendant 18K Gold 11.3g V1124
Located in Osprey, FL
This exquisite Australian Boulder Opal pendant features a stunning feather-like design in a matte
Category
2010s American Pendant Necklaces
Materials
Opal, 18k Gold, Yellow Gold
Free Shipping
H 0.23 in W 0.84 in L 1.29 in
Lady's Mintabie Boulder Opal and Diamonds 18k Yellow Gold
Located in New York, NY
One lady's black opal in blue-green fire color. Vivid saturation scale with flash fire pattern
Category
Vintage 1970s American Art Deco Brooches
Materials
Diamond, Opal, 18k Gold, Yellow Gold
38.17ct Australian Boulder Opal Ring Pendant 18K Gold 35.8g V1129
Located in Osprey, FL
This striking statement piece is crafted from 18K gold and features a stunning Australian boulder
Category
2010s American Pendant Necklaces
Materials
Opal, 18k Gold, Yellow Gold
Free Shipping
H 0.78 in W 1.03 in L 2.49 in
5.85ct Australian Boulder Opal and Diamond Pendant 18K Gold V1126
Located in Osprey, FL
This stunning 5.85ct Australian Boulder Opal and Diamond Pendant will captivate you with its
Category
2010s American Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, Yellow Gold
Free Shipping
H 0.22 in W 0.67 in L 1.66 in
Natural Untreated Australian 32.73ct Boulder Opal Pendant Necklace 18K Gold
Located in Sydney, AU
The white-blues and sparkling silvers of wintry dreams swirl in this dreamy boulder opal pendant
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Opal, Yellow Gold, 18k Gold
Free Shipping
H 1.99 in W 0.79 in
Mineable Boulder Opal, Diamonds, and Black Opal Broach in 18k Yellow Gold
Located in New York, NY
One lady's semi-black peacock opal with multicolor fire pattern. Saturation scale is vivid with a
Category
Vintage 1970s American Art Deco Brooches
Materials
Diamond, Opal, Black Opal, Yellow Gold
Free Shipping
W 1.82 in L 0.83 in
Steven Battelle 4 Carats Boulder Opal Sterling 18k Gold Ring
By Steven Battelle
Located in Soquel, CA
A beautiful irregular shaped 9 x 19 mm cabochon of Quipee mine Australian boulder opal displays
Category
21st Century and Contemporary Balinese Contemporary Cocktail Rings
Materials
Opal, 18k Gold
Australian Natural Untreated Boulder Opals Necklace in 18k Yellow Gold
By Renata Bernard
Located in Sydney, AU
of stunning boulder opals (0.77ct) ethically sourced from our Jundah-Opalville, Queensland mines. Set
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Opal, 18k Gold, Yellow Gold
Australian 6.10ct Black Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
The rich, bright colours of this unbelievable black boulder opal are without compare. The purples
Category
21st Century and Contemporary Australian Choker Necklaces
Materials
Diamond, Opal, 18k Gold, Platinum
Australian Boulder Opal and Diamond Ring 18K Gold 13g V1109
Located in Osprey, FL
This Australian Boulder Opal and Diamond Ring in 18K Gold is a stunning piece of jewelry that will
Category
2010s American Engagement Rings
Materials
Diamond, Opal, 18k Gold, Yellow Gold
18k Gold Australian Boulder Opal and South Sea Pearl Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
An exquisite 18k gold pendant with an Australian Boulder Opal and a golden South Sea Pearl. This is
Category
2010s Dutch Artisan Pendant Necklaces
Materials
Opal, South Sea Pearl, 18k Gold
Natural Australian 22.27ct Boulder Opal Diamonds Pendant Necklace 18K Gold
By Renata Bernard
Located in Sydney, AU
The ‘Venus’ boulder opal necklace (22.7ct) masterfully set in 18K white gold is truly a remarkable
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, White Gold
Free Shipping
H 1.5 in W 1.02 in
Natural Untreated Australian 6.65ct Boulder Opal Diamonds Necklace 18k Gold
By Renata Bernard
Located in Sydney, AU
versatile boulder opal (6.65ct) sourced from Winton mines in Queensland, Australia, bound to turn heads by
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, Yellow Gold
Free Shipping
H 0.85 in W 0.52 in
Steven Battelle 9.1 Carats Australian Boulder Opal 18K Gold Ring
By Steven Battelle
Located in Soquel, CA
A beautiful electric blue and green approximately 15 x 17 mm triangular Australian boulder opal
Category
21st Century and Contemporary American Contemporary Cocktail Rings
Materials
Opal, 18k Gold
Natural Untreated Australian 16.30ct Boulder Opal Diamonds Necklace 18k Gold
By Renata Bernard
Located in Sydney, AU
16.30ct boulder opal hailing from Winton mines in Queensland, Australia. The attractive blue-green play-of
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, Yellow Gold
Free Shipping
H 0.9 in W 0.77 in
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
Natural Australian 6.73ct Boulder Opal Pendant Necklace 18K White Gold
By Renata Bernard
Located in Sydney, AU
"I Sea You" opal pendant features an exquisite boulder opal (6.73ct) sourced from Winton, Australia
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Diamond, Opal, 18k Gold, White Gold
Free Shipping
H 1.27 in W 0.34 in
Natural Untreated Australian 22.45ct Boulder Opal Pendant Necklace 18k Gold
By Renata Bernard
Located in Sydney, AU
The “Special Vision” opal pendant is quite the eye-catching piece featuring a gracious boulder opal
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Diamond, Opal, Yellow Gold, 18k Gold
Free Shipping
H 1.89 in W 0.56 in
Natural Untreated Australian 9.50ct Boulder Opal Diamonds Necklace 18k Gold
By Renata Bernard
Located in Sydney, AU
The impressive ‘You Make My Dreams’ boulder opal pendant (9.50ct) exudes modern elegance and is
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Opal, Diamond, 18k Gold, White Gold
Free Shipping
H 1.01 in W 0.6 in
Natural Untreated Australian 4.34ct Boulder Opal Ring in 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
precious 4.34ct boulder opal hailing ethically from our Jundah-Opalville opal mines in Queensland. The
Category
2010s Australian Contemporary Engagement Rings
Materials
Opal, Black Opal, 18k Gold, Yellow Gold
Natural Untreated Australian 11.16ct Boulder Opal Pendant Necklace 18K Gold
Located in Sydney, AU
Simple yet alluring, the ‘Amdis’ boulder opal pendant (11.16ct) is a minimal 18K white gold
Category
2010s Australian Contemporary Pendant Necklaces
Materials
Opal, Diamond, White Diamond, 18k Gold, White Gold
Free Shipping
H 1.28 in W 0.63 in
Natural Untreated Australian 20.69ct Boulder Opal Ring in 18K Yellow Gold
By Renata Bernard
Located in Sydney, AU
and playful hues. This beautiful 20.69ct boulder opal is elaborately decorated with 37 sparkling
Category
2010s Australian Contemporary Cocktail Rings
Materials
Opal, Black Opal, 18k Gold, Yellow Gold
Custom Australian Boulder Opal 18kt Pendant
Located in Bloomington, MN
Custom Australian Boulder Opal 18kt Pendant
Introducing an exquisite piece of craftsmanship – a
Category
Late 20th Century Contemporary Pendant Necklaces
Materials
Diamond, Opal, 18k Gold
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18k Boulder Opal For Sale on 1stDibs
Surely you’ll find the exact 18k boulder opal you’re seeking on 1stDibs — we’ve got a vast assortment 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. Find an antique version now, or shop for 68 vintage or 475 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for a 18k boulder opal 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 21st Century, both of which have proven very popular over the years. There have been many well-made iterations of the classic 18k boulder opal over the years, but those made by Renata Bernard, Laura Dalben and Jennifer Kalled are often thought to be among the most beautiful. See these pages for a cabochon iteration of this accessory, while there are also mixed cut cut and round cut cut versions available here, too. Finding a 18k boulder opal for sale for women should be easy, but there are 136 pieces available to browse for unisex as well as men, too.
How Much is a 18k Boulder Opal?
On average, a 18k boulder opal at 1stDibs sells for $5,586, while they’re typically $468 on the low end and $203,600 for the highest priced versions of this item.
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