$24,000Sale Price|56% Off
NWT $55, 000 Rare 18KT Gold Large Boulder Black Opal Fancy Diamond Ring
Located in New York, NY
The Following Items we are offering is a Rare Important Radiant 18KT Gold Glistening Australian Black Opal and Diamond Gorgeous Pendant. Pendant features a Magnificent Rare Color Cha...
Diamond, Opal, Black Opal, Gold, 18k Gold
$39,500Sale Price|56% Off
NWT $90, 000 Rare 18KT Gold Large 17CT Boulder Black Opal Fancy Diamond Pendant
Located in New York, NY
The Following Items we are offering is a Rare Important Radiant 18KT Gold Glistening Australian Black Opal and Diamond Gorgeous Pendant. Pendant features a Magnificent Rare Color Cha...
Diamond, Opal, Black Opal, Gold, 18k Gold
Noblesse Oblige Studio 14mm Boulder Opal Beaded Necklace, 19 Inches
Located in Chesterland, OH
If the matrix is dark, the stones are known as “boulder blacks.” Opal play of color is caused by light diffraction induced by organized silica spheres within the precious opal.
Opal, Sterling Silver
Black Opal Boulder Freeform Diamond Necklace 18k White Gold
Located in Honolulu, HI
Item Specifications: Metal: 18K White Gold Total Weight: 12.0 Grams Chain Length: 16" Gemstone Specifications: Center Gemstone: Boulder Freeform Black Opal Pendant and Bail M...
Diamond, Opal, Black Opal, 18k Gold, White Gold
Boulder Opal black silver necklace Grey Blue Natural Australian Gemstone
Located in Berlin, DE
Black patina silver necklace with natural Boulder Opal gemstone origin - Australia opal weight - 45.6 carat pendant weight - 14.55 grams pendant length - 2.36 in / 60 mm opal measur...
Opal, Silver
18k Gold Short Necklace with Opal Beads Australian Boulder Opal Pendant
By Angelina Fine Jewelry
Located in Amsterdam, NH
A lovely and intriguing necklace with a mesmerising natural Australian black opal pendant strung on dark opal beads. The iridescent stripe across the boulder opal shows plenty "play ...
Opal, Black Opal, 18k Gold
Platinum Australian Black Boulder Opal and Diamond Pin Pendant Flowers
Located in Big Bend, WI
Incredible platinum pin/pendant featuring a large Australian black boulder opal. The opal has blue-green play of color with brown ironstone.
Diamond, Opal, Platinum
Natural 2.45ct Australian Black Boulder Opal 9k Yellow Gold Oval Signet Ring
By Gems and Jewels UK
Located in Birmingham, GB
Natural Australian Black Boulder Opal 9k Yellow Gold Signet Ring. A stunning 2.45 carat natural black boulder opal with a beautiful blue, purple and green play of colour and an exce...
Opal, Black Opal, Gold, 9k Gold, Yellow Gold
Natural 1.38ct Australian Black Boulder Opal 9k Yellow Gold Oval Signet Ring
By Gems and Jewels UK
Located in Birmingham, GB
Natural Australian Black Boulder Opal 9k Yellow Gold Signet Ring. A stunning 1.38 carat natural black opal with a beautiful blue and purple play of colour and an excellent oval cabo...
Opal, Black Opal, Gold, 9k Gold, Yellow Gold
Natural 1.56ct Australian Black Boulder Opal 18k Yellow Gold Oval Signet Ring
By Gems and Jewels UK
Located in Birmingham, GB
Natural Australian Black Boulder Matrix Opal 18k Yellow Gold Oval Signet Ring.
Opal, Black Opal, Gold, 18k Gold, Yellow Gold
Natural 3.45ct Australian Black Boulder Opal 18k Yellow Gold Oval Signet Ring
By Gems and Jewels UK
Located in Birmingham, GB
Natural Australian Black Boulder Matrix Opal 18k Yellow Gold Oval Signet Ring.
Opal, Black Opal, Gold, Yellow Gold, 18k Gold
Natural 12.61 Ct Australian green-blue black boulder opal mined by Sue Cooper
Located in BELCONNEN, ACT
This rare 12.61 Ct Australian black boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2021.
Opal, Black Opal
$1,000Sale Price|20% Off
116-Carat Boulder Opal Sculpture from Queensland, Australia
Located in New York, NY
This exceptional 116-carat Boulder Opal from Queensland, Australia, displays a mesmerizing play of color with vivid flashes of electric blue, green, and fiery orange coursing through...
Opal
Fine Australian Boulder Opal Diamond Platinum Ring
Located in Beverly Hills, CA
This is a fine example of Australian opal; being a boulder opal or black opal this piece has fantastic play of color and pattern.
Diamond, Opal, Platinum
Natural 2.75 Ct Australian green and pink black boulder opal mined by Sue Cooper
Located in BELCONNEN, ACT
This beautiful 2.75 Ct Australian boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2024. Sue processed the rough opal herself and cut ...
Opal, Black Opal
Precious White Opal & Boulder Opal "Heartbreak" Earrings in 18K Gold w Diamonds
By Eytan Brandes
Located in Sherman Oaks, CA
Two opals -- one a lively precious white opal, and the other a stormy dark blue boulder opal -- both broken. What to do? Spotting the fact they're the same approximate width, Eytan...
Diamond, Opal, Black Opal, Gold, 18k Gold, Yellow Gold
Natural 5.89 Ct Australian boulder opal mined by Sue Cooper
Located in BELCONNEN, ACT
This amazing 5.89 Ct Australian black boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2023.
Opal, Black Opal
$2,800Sale Price|20% Off
Boulder Opal Sculpture from Queensland, Natural Ironstone Matrix, New
Located in New York, NY
This magnificent Boulder Opal from Australia is a true masterpiece of nature, showcasing a breathtaking play of colors with deep blues, vibrant greens, and fiery oranges against a ri...
Opal
19 Carat Australian Black Boulder Opal Gold Vintage Pendant Necklace
Located in Montreal, QC
Elegant Finely detailed Australian Black Boulder Opal Gold Necklace Featuring a securely Hand set 19 Carat Australian Black Opal.
Gold, 14k Gold, 18k Gold, White Gold
Boulder Opal and Diamond Dangle Earrings in 14k Yellow Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
These elegant dangle earrings feature beautiful boulder opals set in 14k yellow gold with both single and full brilliant-cut diamonds. The opals are eye-catching freeform shapes with...
Diamond, Opal, Black Opal, Gold, 14k Gold, Yellow Gold
Magnificent Australian Loose Black Boulder Opal of 5.50ct. 19mm x 12mm x 4mm.
Located in MELBOURNE, AU
This Australian Loose Boulder Opal is of impressive 5.50ct (19mm x 12mm x 4mm) from Winton, Queensland displaying the superb & truly unique spectrum of colours: from striking Indig...
Opal
Natural 20.39 Ct Australian kite-shaped boulder opal mined by Sue Cooper
Located in BELCONNEN, ACT
This unique 20.39 Ct Australian boulder opal was mined by Sue Cooper at her Yaraka opal mine in western Queensland, Australia in 2020. Sue processed the rough opal herself and cut in...
Opal, Black Opal
18K Yellow Gold 1.50ct Diamond and Boulder Opal Pendant MF40-020326
By LB Exclusive
Located in Southampton, PA
A vibrant Boulder Opal gives this luxury pendant an otherworldly quality. Sophisticated and incredibly captivating, Diamonds with a total weight of 1.50 carats add opulence to the ov...
Diamond, Black Opal, 18k Gold, Yellow Gold
Rare 3.02ct Australian Matrix Boulder Opal 18k Yellow Gold Cushion Signet Ring
By Gems and Jewels UK
Located in Birmingham, GB
This boulder matrix opal has a black body colour typical of fine opals from Winton, Queensland.
Opal, Black Opal, Gold, 18k Gold, Yellow Gold
77.80 Carat Natural Australian Boulder Opal and Diamond Pendant Made in Platinum
Located in Tokyo, JP
A beautiful pendant featuring a 77.80 Carat Australian Boulder Opal and 0.82 Carat Diamonds made in Platinum. The Opal displays very good play of color! Opals are known for exhibitin...
Diamond, Opal, Black Opal, Platinum
4.96 Carat Natural Australian Boulder Opal and Diamond Pendant Made in Platinum
Located in Tokyo, JP
A beautiful pendant featuring a 4.96 Carat, Natural, Australian Boulder Opal and 0.12 Carats of Diamond Accents set in Platinum. The Opal displays very good play of color! Opals are ...
Diamond, Opal, Black Opal, Platinum
11.69 Carat Natural Australian Boulder Opal and Diamond Ring Made in Platinum
Located in Tokyo, JP
A beautiful ring featuring a 11.96 Carat, Natural, Australian Boulder Opal and 0.46 Carats of Diamond Accents set in Platinum. The Opal displays very good play of color! Opals are kn...
Diamond, Opal, Black Opal, Platinum
Australian boulder opals paired with pear-cut tanzanites, 18-karat yellow gold
Located in Laguna Hills, CA
"KJD" hallmark serves as a signature of authenticity and craftsmanship. In the vintage and fine jewelry market, having a clear maker's mark significantly affects the item's valuation...
Tanzanite, Black Opal, 18k Gold, Yellow Gold
1970s Cabochon Cut Boulder Opal 1.52ct Sapphire and 1.28ct Diamond Pendant
Located in Jesmond, Newcastle Upon Tyne
NOTE *Boulder opals are the second most valuable type of opal (following black opal).
Diamond, Opal, Sapphire, 18k Gold, Yellow Gold, 14k Gold
Peter Suchy 4.90 Carat Boulder Opal Garnet Sapphire White Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
One of a kind boulder Opal, Sapphire and Tsavorite pendant necklace.
Garnet, Opal, Sapphire, Gold, 18k Gold, White Gold
$265,000
Opal
Located in New York, NY
There are several names given to opal (Black Opal, Boulder Opal, Fire opal, etc.).
Opal
Elegant Australian Black Opal Diamond Drop Earrings in 18K Yellow Gold
Located in Suwanee, GA
Elegant Australian Black Opal Diamond Drop Earrings in 18K Yellow Gold.
Diamond, Opal, Black Opal, 18k Gold, Yellow Gold, Gold
Unavailable|$40,000
Spectacular Boulder Opal Emerald Sapphire Gold Cocktail Ring
Located in Louisville, KY
A true One of a Kind, without a doubt Spectacular 9.98ct Boulder Black Opal in an irregular, Free Form Shape, 20.75x14.57mm.
Blue Sapphire, Emerald, Opal, Sapphire, 18k Gold
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 wisdom of the most revered temple in Angkor, Cambodia. The ring’s gorgeous opal gem...
Diamond, Opal, Black Opal, Gold, 18k Gold, Yellow Gold
Unavailable|$285,000
24.11ct Natural Solid Untreated Black Boulder Opal
Located in MAIN BEACH, QLD
Once-in-a-lifetime gem, this Australian black boulder opal has no equal. With its stunning ribbon pattern of vivid colours, it is a true wonder.
Opal, Black Opal
Unavailable|$19,900
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 pendant setting. 18K solid gold and high jewellery grade diamonds add to the collectors...
Diamond, Opal, Black Opal, 18k Gold
Unavailable|$29,700
Australian 12.94ct Black Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 12.94ct Opal Origin: Winton, QLD, Australia Diamonds: 0.26ct D IF - F VVS Metals: 18K solid Gold, Platinum Ring Size: Resize...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$4,439
Black Boulder Opal 21 1/4" Flat Cable Festoon 14K Necklace
Located in Fuquay Varina, NC
Black boulder opal are like no other opal and just stunning in their natural form.
Opal, Black Opal, 14k Gold, Yellow Gold
Unavailable|$61,000
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 and reds, greens and pinks, it has every desired colour, and they are vivid.
Diamond, Opal, 18k Gold, Platinum
Unavailable|$12,650
Australian 8.01ct Boulder Opal, Emerald & 18K Gold Brooch
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 8.01ct Opal Origin: Winton, QLD, Australia Dimensions: 50.5 x 40.1mm Metals: 18K solid Gold THE GRYFFIN OPAL DIFFERENCE By...
Diamond, Opal, Black Opal, Emerald, 18k Gold
Unavailable|$1,000
Australian Koroit Black Boulder Opal Sterling Silver Pendant by Ken Fury
By Ken Fury
Located in Queens, NY
Koroit black boulder opal is considered to be one of the rarest and most valuable types of boulder opal, known for its dark body tone and intricate matrix.
Opal, Sterling Silver
Unavailable|$13,400
Australian 3.72ct Boulder Opal & 18K Gold Bracelet
Located in MAIN BEACH, QLD
Set in a solid 18k gold chain, this piece is designed as unisex jewellery and as daily fashion. SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 3.72ct Opal Origin: Winton,...
Opal, 18k Gold
Unavailable|$134,000
Australian 20.05ct Boulder Opal, Diamond & Platinum Necklace
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 20.05ct Opal Origin: Winton, QLD, Australia Diamonds: 1.59ct D IF - F VVS Metals: Platinum Chain: 31.0g 18K Gold (supplied w...
Diamond, Opal, Platinum
Unavailable|$12,800
Australian 1.67ct Boulder Opal, Diamond & Platinum Necklace
Located in MAIN BEACH, QLD
A modern piece set with three black boulder opals. A large diamond in the bail with a solid platinum setting.
Diamond, Opal, Platinum
Unavailable|$32,000
Australian 3.06ct Boulder Opal, Diamond & Platinum Ring
Located in MAIN BEACH, QLD
It is vivid in its depth of colours, showing the most sought after reds and blues. This stunning black boulder opal is set in platinum and has two large high jewellery grade diamonds...
Diamond, Opal, Platinum
Unavailable|$26,500
Australian 7.00ct Boulder Opal, Diamond, 18K Gold & Platinum Ring
Located in MAIN BEACH, QLD
This amazing blue-green black boulder opal is of clean, vivid colour, set in an 18K solid gold and platinum ring with high jewellery grade diamonds.
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$16,800
3.78ct Australian Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
Sophisticated yet simple. Stylish for evening or daytime. Sparkling green colours to fill your heart with flutters this very cute flower necklace has it all. A moss green Boulder Opa...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$22,000
Australian 4.38ct Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Boulder Opal Opal Weight: 4.38ct Opal Origin: Winton, QLD, Australia Diamond: 0.03ct D IF - F VVS Metals: 18K solid Gold, Platinum Chain: 12.7g, 18K solid G...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$39,800
Australian 21.86ct Boulder Opal, Diamond, Platinum & 18K Gold Necklace
Located in MAIN BEACH, QLD
Set with high jewellery grade diamonds, solid platinum and 18K gold, this pendant is a one-of-a-kind beauty that deserves to be worn regularly. SPECIFICATIONS Opal Type: Black Bould...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$8,700
Australian 2.60ct Boulder Opal, Diamond, 18K Gold & Platinum Necklace
Located in MAIN BEACH, QLD
For the lovers of blue-green opals, this gorgeous pendant will surely please. A very bright blue-green Boulder Opal with flicks of orange and gold and hints of purple this stone is t...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$26,500
Australian 3.00ct Boulder Opal, Diamond, 18K Gold & Platinum Bracelet
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 3.00ct Opal Origin: Winton, QLD, Australia Diamonds: 0.16ct D IF - F VVS Metals: 18K solid Gold, Platinum THE GRYFFIN OPAL ...
Diamond, Opal, Black Opal, 18k Gold, Platinum
Unavailable|$186,000
Australian 61.79 Crat Boulder Opal & 18k Gold Necklace
Located in MAIN BEACH, QLD
One is solid 18K gold rope chain and the other is a Kangaroo Leather chain with solid 18K gold fittings. SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 61.79ct Opal Orig...
Opal, 18k Gold
Unavailable|$35,500
Australian 23.25ct Boulder Opal, Diamond & 18K Gold Cufflinks
Located in MAIN BEACH, QLD
Bring a little extra sophistication to your bling (and your shirt) with these stunning black boulder opal and diamond cufflinks. SPECIFICATIONS Opal Type: Black Boulder Opal Opal We...
Diamond, Opal, 18k Gold
Unavailable|$29,500
Australian 9.59ct Boulder Opal, Diamond & 18K Gold Bracelet
Located in MAIN BEACH, QLD
A very unusual yet beautiful multicoloured black boulder opal set in 18K solid gold with high jewellery grade diamonds.
Diamond, Opal, 18k Gold
Unavailable|$167,000
Australian 10.38ct Boulder Opal, Diamond & 18K Gold Ring
Located in MAIN BEACH, QLD
Viewings can be arranged virtually via our online concierge service. SPECIFICATIONS: Opal Type: Black Boulder Opal Opal Weight: 10.38ct Opal Origin: Winton, QLD, Australia Diamonds...
Diamond, Opal, 18k Gold
Unavailable|$126,880
Australian 22.8ct Boulder Opal, Diamond & 18K Gold Necklace
Located in MAIN BEACH, QLD
SPECIFICATIONS Opal Type: Black Boulder Opal Opal Weight: 22.80ct Opal Origin: Winton, QLD, Australia Diamonds: 0.24ct D IF - F VVS Metals: 18K Solid Gold Chain: 8.9g 18K Gold Omega ...
Diamond, Opal, 18k Gold
Unavailable|$7,500
EGL Certified 14 Karat 1.15 Carat Black Boulder Opal and Diamond Ring
Located in Mobile, AL
Antique 14 karat 1.15 carat Black Boulder Opal and 1.91 carat Miner Cut Diamonds Ring.
Diamond, Opal, 14k Gold
Opals were discovered in 400 BC, and since then five types have been found throughout the world. Before you start shopping for mysteriously beautiful vintage opal rings and other opal jewelry, learn about the different varieties of the gem — and find out which historical figure was reportedly willing to trade his kingdom for a single stone.
Here is a little riddle for you: the month of October has two birthstones, but only one of them encompasses the colors of other birthstones. If you guessed opal, you’re right! (The other gemstone associated with the month of October is tourmaline.)
Opals are such unusual gemstones that there are too many old-wives tales associated with them, like if you’re a blond, wearing an opal necklace will protect your locks from losing color. Opals were also very fashionable in the early 19th century, up until the publication of Sir Walter Scott’s novel Anne of Geierstein in 1829. The title heroine wears an opal and succumbs to an untimely death. However, the British monarchy, and in particular Queen Victoria, did not let this story get in their way, and they frequently gifted opals to friends and family members. October babies should disregard the noise and proudly wear their opals!
There are five types of precious opals: boulder opal, fire opal, crystal/water opal, black opal, and white/light opal. Each variety is distinguished by its color.
So, where does the name come from? The word opal is thought to originate from the Roman opalus or from the Sanskrit úpala (“precious stone”) or from the Greek opallios (“to see a color change”). So while there have been many names for the stones, opals were first discovered in 400 BC in Ethiopia. But the early reference that comes up most often in history books is from the Roman philosopher Pliny the Elder, who wrote about it in 75 AD. In his text he refers to it as opali. The Romans were big fans of opal, Mark Antony was so enamored by it that, as the story goes, he was willing to trade a portion of his kingdom for a single opal.
There's a wide variety of antique and vintage opal jewelry on 1stDibs (and you won't have to trade your kingdom for it).