Opal Meaning: Symbolism, History and What Each Color Stands For

Opal means hope, purity and truth in European tradition, and love and hope in ancient Rome. Because a single stone shows every color, it was long thought to carry the virtues of all gems, and today it also stands for creativity and change. It is the October birthstone and the 14th-anniversary gem. The belief that opals bring bad luck dates only from the nineteenth century.

What Opal Means

Every opal meaning starts from one observation: a single stone shows every color.

The Roman author Pliny looked into an opal and saw the fire of carbuncle, the purple of amethyst and the green of emerald at the same moment. If one gem held the colors of all the others, the reasoning went, it must hold their virtues too. That idea lasted well over a thousand years. Writing in 1913, the mineralogist George Frederick Kunz noted that until three or four centuries earlier opal was thought to combine the powers of every colored stone.

The specific meanings that grew from it:

• Hope, purity and truth. The long-standing European reading, as recorded by the Gemological Institute of America (GIA).
• Love and hope. What the gem stood for in ancient Rome, where its name, opalus, was a byword for "precious stone."
• Foresight. The ancient Greeks believed opal gave its owner the gift of prophecy and guarded against disease.
• Good fortune. GIA's summary is that for most of history opal was regarded as "the luckiest and most magical of all gems."
• Change and imagination. A stone that never looks the same twice became shorthand for a changeable mind. In Shakespeare's Twelfth Night the clown tells Duke Orsino, "thy mind is a very opal." Modern writers have softened that into creativity and inspiration.

So what opal symbolizes, in one line, is hope and the full range of feeling. It is worn today as the October birthstone and given for a 14th wedding anniversary. For two other luminous gems with long traditions of their own, see our guides to moonstone meaning and pearl meaning.

Where the Name Opal Comes From

The etymology is less settled than most guides admit.

English "opal" comes from the Latin opalus. Most modern references trace that word to the Sanskrit upala, meaning "precious stone," which fits the Roman belief that the gems arrived from India. GIA accepts this origin.

The rival theory derives it from the Greek opallios, usually glossed as "to see a change of color." The difficulty is timing: historians note that opallios appears in Greek only after Rome had absorbed the Greek states, and that earlier Greek writers called the stone paederos. The Greek word looks like a borrowing from Latin, not its source. Geoscience Australia lists both theories and calls the origin uncertain.

Opal as a Given Name

As a first name, Opal is taken directly from the gem, so it carries the same sense: jewel, precious stone. It came into use with other jewel names in the late Victorian era, ranked among the 100 most popular names for American girls from 1904 to 1919, and has been back in the US top 1,000 since 2017.

Opal Through History

Two thousand years in seven steps.

1. First century AD: Pliny ranks opal second only to emerald. In Book 37 of his Natural History the Roman author says that of all precious stones opal presents "the greatest difficulties of description." He tells of the senator Nonius, who owned an opal the size of a hazelnut, valued at two million sesterces. Proscribed by Mark Antony for the sake of the stone, Nonius fled and took nothing with him but the ring.
2. Middle Ages: the eye stone. Medieval writers described an "eye stone," ophthalmios, generally identified with opal. It was said to keep the wearer's sight sharp while clouding the eyes of onlookers, which earned it the nickname "patron of thieves." Blond women wore opal necklaces in the belief that the stone preserved the color of their hair. Europe's supply came from mines in what was then Hungary and is now Slovakia, where more than three hundred men are said to have worked at the start of the fifteenth century.
3. 1829: Walter Scott publishes Anne of Geierstein. The novel that later took the blame for opal's unlucky reputation (next section).
4. 1853: Prince Albert designs an opal circlet for Queen Victoria. Made by Garrard and set with opals and diamonds. Queen Alexandra had the opals replaced with rubies in 1902.
5. 1875: Australia. Opal is first mined commercially in Queensland, and by 1932 Australia is the leading producer. Geoscience Australia puts its share of the world's precious opal at 95 percent, a figure that rising Ethiopian output has made harder to confirm. Opal was declared Australia's national gemstone on July 27, 1993.
6. 1912: the birthstone list. American jewelers adopt a standard list with opal as the October birthstone and tourmaline as its alternate. Opal was not dropped, as some guides claim; Kunz printed the list the following year. Our October birthstone guide covers both stones.
7. 1964: the color is explained. J. V. Sanders of Australia's CSIRO shows that opal's flashes come from ordered silica spheres diffracting light. Ten years later Pierre Gilson uses that finding to grow opal in a laboratory.

One caution about Pliny. He believed India was the only source, yet opal is not found where he placed it, a point his 1855 translators and Kunz both raise. Kunz doubted the Hungarian mines were open to Rome and wondered whether Pliny's opalus was our opal at all. Geoscience Australia takes the simpler view that Roman opal came from eastern Europe. For the wider story of how stones acquired their reputations, see the history of gemstone symbolism.

The Bad-Luck Myth and Where It Came From

Opals are not unlucky, and the belief that they are is younger than the United States.

In Scott's novel a character recounts the legend of Hermione of Arnheim, who wears an opal on a gold clasp in her hair. The stone flashes when she is animated. In the chapel her husband flicks a few drops of holy water at her forehead; one lands on the opal, which shoots out "a brilliant spark like a falling star" and goes dull as a pebble. Hermione collapses, and two hours later only a handful of ashes lies on her bed.

Nothing in the passage says opals bring misfortune. The gem is enchanted because its owner is enchanted. Kunz made this point in 1913, writing that the superstition owed its origin to "a careless reading" of the book, and that Scott could as easily have chosen a diamond or a ruby. GIA likewise attributes the belief to the novel and not to any ancient experience.

What the Record Supports

• The belief is nineteenth-century. Kunz found no trace of it in Elizabethan or earlier writing on opal.
• It may not have spread immediately. A gift annual titled The Opal was popular in the 1840s, an unlikely name if the stone were already feared. In 1875 Queen Victoria's private secretary, Sir Henry Ponsonby, wrote to the journal Notes and Queries to ask where the superstition came from, and none of the replies named Scott.
• The sales collapse is poorly sourced. The often-repeated claim that European opal sales halved within a year of the novel traces to a 1997 history of opal. We could not find period trade figures behind it and do not repeat it as fact.
• Workshops had a practical grievance. Kunz's own explanation: cutters and setters were liable for any gem they broke, opal is brittle, and craftsmen who lost money on it came to call it unlucky.
• Black opal was the exception. Even while other opals were distrusted, Kunz recorded black opal as "an exceptionally lucky stone."

A related version says opal is unlucky only for people not born in October. It has the same nineteenth-century origin and no older basis.

Spiritual Meaning and Protection

What traditions and modern crystal practice claim, labeled as claims.

In modern crystal practice opal is called a stone of inspiration. It is linked with creativity, emotional expression and intuition, and usually assigned to the heart and crown chakras. These associations are recent. The older spiritual tradition is the one above: hope, foresight and luck, with Arabic legend adding that opals fell from the sky in flashes of lightning.

What Opal Is Said to Protect Against

Historically, four things: disease (ancient Greece, and Eastern amulets described in the 1830s); failing eyesight (medieval Europe); being seen, hence the thieves; and fading blond hair. An opal believed to sit in the crown of the Holy Roman Emperor was said to guard the royal honor. These are beliefs historians recorded, not effects anyone has measured. Jewelry is not medical treatment.

Who Should Not Wear Opal

No sound tradition forbids anyone. The "October only" rule is the Scott-era superstition. Astrological lists contradict one another: October's dates span Libra (September 23 to October 22) and Scorpio (October 23 to November 21), while popular crystal pages name Libra and Pisces. Our zodiac birthstones guide sets out the competing systems.

The practical answer: opal rates 5 to 6.5 on the Mohs scale and GIA describes its toughness as very poor to fair, so it is the wrong stone for someone who wants a ring that takes daily knocks without thought.

Opal in the Bible

We searched twelve English translations, including the King James, NIV, ESV, NASB and NLT. The word "opal" appears in none of them, so it is absent from their lists of the high priest's breastplate stones and the foundation stones of the New Jerusalem. Pages offering a "biblical meaning of opal" are describing a modern association.

Opal Meaning by Color and Type

The middle column is gemology. The right-hand column is tradition or modern association, not fact.

Only the first two rows have real age. The color-by-color meanings follow general color symbolism (pink for affection, blue for calm, green for growth) and say nothing particular about opal. Choose the color you like. Our guides to black opal and fire opal engagement rings go deeper on those two.

Why Opal Flashes Color

The physical fact behind every meaning.

Opal is hydrated silica: silicon dioxide with water held in its structure, up to 20 percent according to GIA and more typically 6 to 10 percent. It has no crystal lattice, which makes it a mineraloid, not a mineral.

Precious opal is built from sub-microscopic silica spheres stacked in a regular grid. Light passing between them diffracts and splits into spectral colors. Sphere size sets the color: about 0.1 micron gives violet, about 0.2 micron gives red, and red is the rarest because it needs the largest spheres. Sanders published the mechanism in Nature in December 1964 from CSIRO's Division of Tribophysics in Melbourne.

Opal without that regular stacking shows no play-of-color and is called common opal. Pink, blue and green opal belong to that group.

The flashes contain no pigment. The color comes from structure alone.

Opalite Is Not Opal

A common mix-up, and an old one.

Opalite is a trade name for man-made opalescent glass. It looks blue against a dark background and milky white with an orange or pink glow against a light one, and it may contain small air bubbles from manufacture. It has no play-of-color and no geological history. The same name is occasionally applied to impure common opal, which adds to the confusion. Searches for the word rose in August 2025 when Taylor Swift announced a song titled "Opalite."

Glass standing in for opal is nothing new. Pliny wrote that no stone was imitated by fraudulent dealers more exactly, and gave a test that still works: hold the piece to sunlight. Glass shows one even tint. Genuine opal throws different colors in succession as it turns.

Opalite's meanings come from the modern crystal trade. If a piece was sold to you as opal and looks identical from every angle, ask what it is.

Wearing and Giving Opal

The occasions, and what Aquamarise sets.

October birthdays. Opal is the traditional October stone, and October's birthstone jewelry is the most direct use of its meaning. Fourteenth anniversaries. GIA lists opal as the 14th-anniversary gem, which makes an anniversary ring a natural choice.

Engagement rings. An opal engagement ring carries the old reading of hope, purity and truth, plus one modern idea: no two opals are alike, so the ring is specific to one person. It also asks for care. Before choosing one, read our opal engagement ring guide on durability and settings, then browse opal engagement rings or the sharper kite-cut opal designs.

Shop the Look

Natural Australian Opal Rings

Oval opal cabochons in sterling silver with a rhodium finish or 14K gold vermeil.

Shop Opal Jewelry

What Aquamarise Opal Is

Aquamarise sets opal in three forms. The product page says whether a given center stone is natural or lab-created.

• Natural Australian opal. Oval cabochons in vintage-style rings, in sterling silver with a rhodium finish or 14K gold vermeil. Every stone has its own pattern.
• Lab-created opal. Used for vividly colored designs such as the blue and black "fire opal" rings. Gemologists reserve that term for the yellow-to-red Mexican stone; in jewelry retail it also describes lab-created opal with strong flashes. The play-of-color is real and more consistent from stone to stone.
• Crushed opal inlay. Set into tungsten carbide for opal wedding bands and other men's inlay rings, often beside meteorite or blue sandstone, and paired with a matching ring in couples sets.

Whichever you choose, keep opal away from high heat and sudden temperature changes, store it apart from harder gems, and clean it with warm soapy water. Our jewelry care page has the full routine.

Sources for the history in this guide: GIA's Opal History and Lore and Pliny the Elder's Natural History, Book 37, Chapter 21 (1855 translation, Tufts University). Other sources include Kunz's The Curious Lore of Precious Stones (1913), Scott's novel, and Geoscience Australia.

Opal Meaning FAQ