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Boulder Opal Multi-Colored Gemstones 18K Gold Cocktail Ring
Located in Beverly Hills, CA
A captivating cocktail ring featuring a mesmerizing opal with a multi-colored hue. The opal is set
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Opal, 18k Gold, Yellow Gold

Yaraka Boulder Opal Drop Pendant with Diamond Box Bale in 18K Gold 14K Collar
By Eytan Brandes
Located in Sherman Oaks, CA
shares the stage with a knockout boulder opal from Broken River Mining in Australia. The 18 karat gold
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Opal, Gold, 14k Gold, 18k Gold, Yellow Gold

Boulder Opal Gold Plated Silver Necklace Game of Thrones Style
Located in Berlin, DE
18K gold plated silver necklace with natural Boulder Koroit Opal opal origin - Australia opal
Category

2010s German Artist Pendant Necklaces

Materials

Opal, Gold Plate, Silver

15 Carat Australian Boulder Opal Diamond 18k Yellow Gold Necklace
Located in Beverly Hills, CA
A captivating link necklace showcasing a stunning Australian opal as its centerpiece. The opal
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Bright Blue Freeform 2.5ct Australian Boulder Opal Diamonds 24K Gold Silver Ring
By Kurtulan
Located in Bozeman, MT
Striking, Bright Blue, Australian Boulder Opal, 24k Yellow Gold, Sterling Silver Hanedan Ring w
Category

21st Century and Contemporary Turkish Contemporary Cocktail Rings

Materials

Diamond, Opal, Gold, 24k Gold, Yellow Gold, Silver, Sterling Silver

Boulder Opal Silver Pendant Genuine Australian Green Peat Brown Gemstone gift
Located in Berlin, DE
Silver pendant with natural Boulder Koroit Opal gemstone origin - Australia opal measurements
Category

2010s German Artist Pendant Necklaces

Materials

Opal, Silver

Australian Boulder Opal Silver Pendant Brown Raw Red Flash Opalescence Gemstone
Located in Berlin, DE
Silver pendant with natural Boulder Koroit Opal gemstone origin - Australia opal measurements
Category

2010s German Artisan Pendant Necklaces

Materials

Opal, Silver

Big Blue Boulder Opal Silver Ring Unisex Statement Natural Koroit Opal Jewelry
Located in Berlin, DE
Large beautiful nature Boulder - Koroit-type - Opal ring in sterling silver ring size - 9 US weight
Category

2010s European Artisan Cocktail Rings

Materials

Opal, Silver

Boulder Opal Gold Pendant Russet Brown Australian Gemstone vintage style gift
Located in Berlin, DE
14K yellow gold pendant with natural Boulder Koroit Opal opal origin - Queensland, Australia
Category

2010s German Artisan Pendant Necklaces

Materials

Opal, Gold, 14k Gold, Yellow Gold

35.23 Carat Australian Boulder Opal Tsavorite 18K Yellow Gold Cocktail Ring
Located in Beverly Hills, CA
A captivating opal, weighing 32.23 carats, forms the centerpiece of this contemporary ring. The
Category

21st Century and Contemporary American Contemporary Fashion Rings

Materials

Opal, Tsavorite, 18k Gold, Yellow Gold

32.41 Carat Australian Boulder Opal Diamond 18K Yellow Gold Platinum Brooch
Located in Beverly Hills, CA
A striking brooch featuring a large and impressive 32.41 carat Australian opal. The opal displays
Category

21st Century and Contemporary American Contemporary Brooches

Materials

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

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. A beautiful 1.56ct
Category

21st Century and Contemporary Signet Rings

Materials

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. A beautiful 3.45
Category

21st Century and Contemporary Signet Rings

Materials

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

Large Boulder Opal Ring silver Natural Australian Woody Musk Dark Brown Gemstone
Located in Berlin, DE
Natural Koroit Opal silver ring with matte finish opal origin - Australia opal weight - 16.5
Category

2010s German Artisan Cocktail Rings

Materials

Opal, Silver

Boulder Opal and precious opal ring in silver with gold-plated setting sapphire
Located in Berlin, DE
unique cluster design features two natural opals shimmering with blue and green fire, accented by two
Category

2010s German Artisan Cluster Rings

Materials

Opal, Sapphire, Gold Plate, Silver

La Estrella - Halo Trillion Diamond Boulder Opal Engagement Ring 18K Yellow Gold
Located in Suwanee, GA
La Estrella - Halo Trillion Diamond Australian Black Opal Engagement Wedding Ring 18K Yellow Gold
Category

2010s American Arts and Crafts Engagement Rings

Materials

Diamond, Opal, 18k Gold, Yellow Gold

13.77 Carat Boulder Opal Multi-Colored Stones Diamond 18K Gold Pendant-Necklace
Located in Beverly Hills, CA
A striking pendant necklace showcasing a brilliant-cut opal as its centerpiece. The opal, weighing
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Tsavorite, Sapphire, Opal, Diamond, Citrine, Yellow Gold, White Gold, 18...

Blue Green Boulder Opal, Aquamarine and Diamond Necklace in 18k White Gold
Located in Honolulu, HI
This unique piece of jewelry is one-of-a-kind. At its center is a stunning blue green opal
Category

Late 20th Century Unknown Modern Pendant Necklaces

Materials

Diamond, Aquamarine, Opal, 14k Gold, Yellow Gold, 18k Gold, White Gold

Aurora Boulder Opal 18K gold and silver ring red blue green yellow opalescences
Located in Berlin, DE
A captivating “Aurora” ring featuring a natural Australian opal, glowing with a full spectrum of
Category

2010s Contemporary Cocktail Rings

Materials

Opal, Gold Plate, Silver, 18k Gold

Multi Fancy Shape White Blue Boulder Opals Diamond Halo 18K Gold Drop Earrings
By Unbranded
Located in Oakton, VA
. Crafted in 18k gold, it features a cascade of iridescent opal stones (29.57 carats) set in delicate bezels
Category

21st Century and Contemporary Drop Earrings

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Gold Ring Opal Waves Boulder ring Gemstone Unisex Jewelry
By Alexey Gabilo
Located in Berlin, DE
boulder opal in place. Thoughtful, masterful craftsmanship is apparent in this artistic solitaire ring
Category

2010s French Art Nouveau Cocktail Rings

Materials

Opal, Gold, 14k Gold

BUNDA Hollywood Opal Pendant, 2.41ct Opal, 0.09ct Diamonds, 18k gold
Located in SYDNEY, AU
A BUNDA 'Hollywood' pendant in 18ct yellow and white gold, featuring a Boulder Opal, bezel set and
Category

2010s Australian Necklace Enhancers

Materials

Diamond, Opal, 18k Gold

Opal Silver Ivy Ring Natural Australian Gem Boulder Gem Bicolor Blue Pink Unisex
Located in Berlin, DE
Patinated gold-plated silver ring with natural Boulder Opal opal origin - Australia stone
Category

2010s French Art Nouveau Fashion Rings

Materials

Opal, Silver, Sterling Silver

Double-sided pendant with natural Australian Boulder 18K Opal Gold Necklace
Located in Berlin, DE
Double-sided necklace with natural Australian Boulder Opal in 18K yellow gold gemstone origin
Category

2010s German Artisan Pendant Necklaces

Materials

Opal, Gold, 18k Gold, Yellow Gold

BUNDA Opal and Diamond Pendant in 18k white gold
Located in SYDNEY, AU
A BUNDA 'Caelum' Opal pendant made in 18 carat white gold. The boulder opal featuring with blue and
Category

2010s Australian Necklace Enhancers

Materials

Diamond, Opal, White Gold

Boulder Pear Opal Tourmaline Diamond Yellow Gold Enhancer Pendant
Located in Stamford, CT
Opal, diamond and tourmaline pendant enhancer. Pear shaped multi color Boulder Opal mounted in a
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond, Opal, Tourmaline, Gold, 14k Gold, Yellow Gold

MODERNIST Clips-On Earrings In 14Kt Yellow Gold With Diamonds And Rare Opals
Located in Miami, FL
Modernist earrings with boulder opals. These are a beautiful modernist clips-on earrings, crafted
Category

1990s American Modernist Clip-on Earrings

Materials

Diamond, Opal, White Diamond, Gold, Yellow Gold, 14k Gold

AJD Brazilian Opal in Unique Sterling and 18K Gold Pendant
By Aria Jewelry Design
Located in Raleigh, NC
Unique Brazilian Boulder Opal Pendant in Sterling Silver and 18K Gold Discover the elegance of our
Category

Late 20th Century Brazilian Artisan Pendant Necklaces

Materials

Opal, 18k Gold, Sterling Silver

Opal Gold Ring Genuine Australian special person gift opal wedding anniversary
By Alexey Gabilo
Located in Berlin, DE
This ring has a majestic Boulder Opal in a sublime White Gold body that has a medieval structured
Category

2010s French Contemporary Dome Rings

Materials

Opal, Gold, 14k Gold, White Gold

Gold Opal ring Statement Valentine s Day gift Engagement ring
By Alexey Gabilo
Located in Berlin, DE
boulder opal in place. Thoughtful, masterful craftsmanship is apparent in this artistic solitaire ring
Category

2010s French Art Nouveau Engagement Rings

Materials

Opal, Gold, 14k Gold

Opal Diamond Pendant Necklace
Located in New York, NY
Opal & Diamond Pendant Necklace. A necklace featuring a large boulder opal pendant. surrounded
Category

Vintage 1980s Unknown Pendant Necklaces

Materials

Diamond, Opal, Platinum

Australian Opal Hand-Forged Oxidized Silver and 22 Karat Gold Dangle Earrings
By Vicki Orr
Located in Naples, FL
green blue Australian Boulder Opals. Unique, beautiful and one-of-a-kind artisan earrings.
Category

2010s American Contemporary Dangle Earrings

Materials

Opal, 22k Gold, Yellow Gold, Silver, Sterling Silver, Gold

Large Opal Necklace silver Blue Genuine Australian Gemstome LOTR Style Pendant
Located in Berlin, DE
Silver pendant with natural Boulder Opal opal origin - Australia opal measurements - 0.16 x 3,94 x
Category

2010s German Artisan Pendant Necklaces

Materials

Opal, Silver

Big Opal Ring Gold Engagement Ring Large Wedding Band
By Alexey Gabilo
Located in Berlin, DE
Natural boulder Opal 14K yellow gold ring Opal origin - Australia opal measurements - 0.16 х 0.59
Category

2010s French Art Nouveau Bridal Rings

Materials

Opal, Gold, 14k Gold, Yellow Gold

Opal Gold Ring Gemstone Unisex Engagement Band
By Alexey Gabilo
Located in Berlin, DE
This ring has a majestic Boulder Opal in a sublime White Gold body that has a medieval structured
Category

2010s French Contemporary Bridal Rings

Materials

Opal, Gold, 14k Gold, White Gold

Michael Kneebone Opal Topaz Aquamarine Sapphire Diamond Confetti Pendant
By Michael Kneebone
Located in Austin, TX
A boulder opal (origin: Queensland, Australia) is the centerpiece of this elegant "Confetti
Category

2010s American Contemporary Pendant Necklaces

Materials

Aquamarine, White Diamond, Opal, Blue Sapphire, Topaz, Diamond, Sapphire...

Opal Vanity case Stone Wood Box wife birthday gift special person wedding gifts
Located in Berlin, DE
An unique 100% handmade Boulder Opal Gemstone in wooden box size of the stone vanity case 168 x
Category

2010s European Artisan Boxes and Cases

Materials

Opal, Brass

Pink Tourmaline, Opal and Diamond 18 Karat Gold Dangle Earrings
By Vicki Orr Designs
Located in Naples, FL
Russian Pink Tourmaline, Australian Boulder Opal and accent white Diamond (0.18 total carats, G-H
Category

2010s American Contemporary Dangle Earrings

Materials

Diamond, White Diamond, Multi-gemstone, Opal, Tourmaline, Gold, Yellow Gold

Opal Vanity case Stone Wood Box wife birthday gift special person wedding gifts
Located in Berlin, DE
An unique 100% handmade Boulder Opal Gemstone in wooden box size of the stone vanity case 168 x
Category

2010s European Artisan Boxes and Cases

Materials

Opal, Brass

Large Vintage Opal Ring 18K Gold silver Chunky Rainbow Cabochon Gift unisex
Located in Berlin, DE
Large vintage 18K gold plated silver ring with natural Boulder Opal gemstone origin - Australia
Category

2010s German Artisan Cocktail Rings

Materials

Opal, 18k Gold, Gold Plate, Silver

Big Opal Boulder Australian Fine gemstone Freeform 47 ct Neon Blue SSEF cert
Located in Berlin, DE
Boulder Opal from Queensland, Australia is one of the rarest gemstones on earth. Spectacular in
Category

2010s Australian Artisan Pendant Necklaces

Materials

Opal

Opal pendant charm in 22 Karat gold
By Pamela Farland
Located in New York, NY
This lovely pendant features Australian boulder opals set in rich 22-karat gold. The chains shown
Category

21st Century and Contemporary Pendant Necklaces

Materials

Opal, Gold, 22k Gold, Yellow Gold

18k Gold Opal and Peridot Drop Earrings
By Angelina Fine Jewelry
Located in Amsterdam, NH
A lovely handmade and one-of-a-kind pair of asymmetrical 18k gold earrings with boulder opals and
Category

2010s European Artisan Drop Earrings

Materials

Opal, Peridot, 18k Gold

Opal necklace gold Unisex pendant Lord of the Rings style gift special person
By Alexey Gabilo
Located in Berlin, DE
One of a kind piece from a Vrubel collection by Alexey Gabilo - gold necklace with big Boulder Opal
Category

2010s French Artisan Pendant Necklaces

Materials

Opal, Gold, 18k Gold, Yellow Gold

Opal Ring Yellow Gold Electric Blue Natural Boulder Australian opal
By Alexey Gabilo
Located in Berlin, DE
14K yellow gold ring with natural Boulder Opal opal origin - Australia opal weight - 9.26 carats
Category

2010s French Artisan Engagement Rings

Materials

Opal, 14k Gold, Yellow Gold

1ct, 11x7mm Australian Opal Ring w Natural Diamonds in 14K White and Yellow Gold
Located in Columbus, OH
This elegant ring features a captivating 1.13ct fancy-shaped Boulder Opal from Australia
Category

21st Century and Contemporary Contemporary Fashion Rings

Materials

Diamond, Opal, Gold, 14k Gold, White Gold, Yellow Gold

Opal, Agate and Peridot Multi-Gemstone 22 Karat Gold Dangle Earrings
By Vicki Orr
Located in Naples, FL
Quartz (5.4 ct), Australian Boulder Opal (8.3 ct), Peridot (7.2 ct), Mexican Fire Opal (2.4 ct), and Fire
Category

2010s American Contemporary Dangle Earrings

Materials

Agate, Multi-gemstone, Opal, Peridot, Quartz, Gold, 22k Gold, Yellow Gold

Ancient Coin, Turquoise, Opal Tourmaline 18 Karat Gold Dangle Earrings
By Vicki Orr Designs
Located in Naples, FL
, Citrine, and Australian Boulder Opal 18k yellow gold asymmetrical dangle earrings. Ancient Roman coin is
Category

2010s American Contemporary Dangle Earrings

Materials

Citrine, Multi-gemstone, Opal, Tourmaline, Turquoise, Turquoise Matrix, ...

Opal Ring Yellow Gold Navy Blue Natural Boulder Australian Opal
By Alexey Gabilo
Located in Berlin, DE
14K yellow gold ring with natural Boulder Opal opal origin - Australia opal weight - 9.26 carats
Category

2010s French Artisan Engagement Rings

Materials

Opal, 14k Gold, Yellow Gold

Opal Gold Pendant Boulder Australian Nature Inspired Necklace
By Alexey Gabilo
Located in Berlin, DE
14K yellow gold pendant with natural Boulder Opal opal origin - Australia opal measurements - 0.24
Category

2010s French Art Nouveau Pendant Necklaces

Materials

Opal, Gold, 14k Gold, Yellow Gold

Estate Opal Pearl Tsavorite Amethyst Two-Tone Gold Cuff Bracelet
Located in Beverly Hills, CA
This modern designed cuff bracelet features a luscious boulder opal in the center with great play
Category

20th Century Cuff Bracelets

Materials

Amethyst, Opal, Pearl, Tsavorite, 18k Gold, 22k Gold, Rose Gold, Yellow ...

18kt Yellow Gold Pear Shaped Australian Opal Ring
Located in San Francisco, CA
. The Australian boulder opal makes you want to sink into the rich pools of peacock tones. The 18kt
Category

Vintage 1970s Cocktail Rings

Materials

Opal, 18k Gold, Yellow Gold

Ancient Roman Coin, Opal Turquoise 22 Karat Gold Asymmetrical Dangle Earrings
By Vicki Orr Designs
Located in Naples, FL
, Ancient Roman bronze coins, Moonstone, raw Paraiba Tourmaline and Australian Boulder Opal. Ancient Roman
Category

2010s American Contemporary Dangle Earrings

Materials

Moonstone, Multi-gemstone, Opal, Tourmaline, Turquoise, Turquoise Matrix...

Ancient Roman Coin, Opal Aquamarine 22 Karat Gold Asymmetrical Dangle Earrings
By Vicki Orr Designs
Located in Naples, FL
Australian Boulder Opals, blue and green Aquamarine, and two ancient Roman bronze coins. Roman coins include
Category

2010s American Contemporary Dangle Earrings

Materials

Aquamarine, Multi-gemstone, Opal, Gold, 22k Gold, Yellow Gold, Bronze

18kt Yellow Gold Australian Opal Diamond Pendant
Located in San Francisco, CA
absolutely stunning piece features a natural wavy Australian boulder opal that displays a breathtaking
Category

Vintage 1970s Unknown Pendant Necklaces

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Intarsia Opal Malachite Black Onyx with Diamond 14K Gold Pendant Necklace
Located in Miami, FL
: 64x25mm Setting: Intarsia Inlay Design Gemstone Details: Natural Boulder Opal: Center inlay Malachite
Category

1990s Art Deco Pendant Necklaces

Materials

Diamond, Onyx, Opal, Gold, 14k Gold, Yellow Gold

Opal
Located in New York, NY
from Ethiopia. There are several names given to opal (Black Opal, Boulder Opal, Fire opal, etc.). This
Category

Antique 15th Century and Earlier Ethiopian Natural Specimens

Materials

Opal

Opal
Opal
$265,000
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Boulder Opals For Sale on 1stDibs

Browse a vast assortment of boulder opals for sale on 1stDibs. These distinct designs — crafted with great care and often made from gold, 18k gold and yellow gold — can elevate any look. Our selection of items includes 260 vintage examples as well as 1200 contemporary versions. Our inventory has long been popular, and it includes earlier versions that date to the 18th Century and newer variations that were made as recently as the 21st Century. contemporary and artisan are consistently popular styles when it comes to boulder opals. Versions of these items have been a part of the life’s work for many jewelers, but those produced by Renata Bernard, Laura Dalben and Jennifer Kalled are consistently popular. There are many cabochon, oval cut and mixed cut boulder opals for sale. When shopping our range of boulder opals, you’ll find that there are less available pieces for men today than there are for women.

How Much are Boulder Opals?

On average, boulder opals at 1stDibs sell for $4,384, while they’re typically $1 on the low end and $350,000 for the highest priced versions of this item.

Why Gold Shines in Jewelry Craftsmanship

Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself. 

Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.

Since its founding, in 1837, Tiffany Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.

For the woman who prefers a minimalist look, the Tiffany Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.

Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.

In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so. 

Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.

Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle. 

BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.

A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in

Since Van Cleef Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.

Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.

Find a stunning collection of vintage and antique gold jewelry on 1stDibs.

The Legacy of Opal in Jewelry Design

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).

Questions About Boulder Opals
  • 1stDibs ExpertAugust 17, 2021
    An Australian boulder opal is an opal mined from a large ironstone boulder under the ground. This type of opal is the second most valuable opal behind the black opal. Spot an Australian boulder opal by checking for a solid layer of brown ironstone left on the back of the stone. Shop Australian boulder opals on 1stDibs.