September 09, 2026

Antique Opals: Why the Victorians Loved Them, and How to Wear One

By Sasha Tarasova

Filed under Antique & Vintage Engagement RingsGemstone GuidesCare, Sizing & Insurance

Opal is the least sensible gemstone in antique jewelry. It is soft, it contains water, it can crack from nothing more dramatic than a change in humidity, and the Victorians put it in rings they wore every day.

They did it because nothing else looks like an opal, and that has not changed.

What produces the colour

Opal is hydrated silica — microscopic silica spheres packed together, with water occupying between roughly three and twenty per cent of the stone by weight.

When those spheres are uniform in size and stacked in an orderly grid, they diffract light passing through them, splitting it into spectral colours. That is play-of-colour, and it is a structural effect rather than a pigment. The size of the spheres determines which colours appear: smaller spheres produce blues and greens, larger ones produce oranges and reds. Red is the rarest and most valuable, because it requires the largest, most uniformly stacked spheres.

Opal without play-of-colour is called common opal or potch and is worth very little. The whole value of the stone is in an optical accident of geometry.

The Victorian love affair

Opal suited the Victorian sensibility precisely. It was iridescent, faintly mystical, and it changed as you moved — all of which appealed to a culture deeply invested in symbolism and sentiment.

Queen Victoria wore and gifted opals extensively, which in the nineteenth century was the most effective marketing available. Late Victorian jewelry is full of them: opal and diamond clusters, opal lockets, opal in daisy settings where the shifting colour sits against old-cut diamonds.

The bad luck story

The superstition that opals bring misfortune is genuinely modern and is usually traced to Walter Scott's 1829 novel Anne of Geierstein, in which a character wears an enchanted opal that loses its fire and precedes her death. The book was widely read and the association stuck; European opal sales are reported to have fallen sharply in the years that followed.

Before that, opal's reputation was the opposite — it was regarded as lucky, precisely because it appeared to contain the colours of every other gemstone at once.

There is a more practical explanation for why the myth survived: opals break. A stone that chips when a modern jeweler handles it carelessly, or crazes years after purchase, generates unhappy owners. Fragility, retold, becomes a curse.

Types you will encounter

• White or light opal — pale body colour with play-of-colour on top. The most common in Victorian jewelry.
• Black opal — dark body colour, against which play-of-colour reads far more vividly. The most valuable type, largely from Lightning Ridge in Australia; it appears in antique jewelry only after that field opened around the turn of the twentieth century, which makes it a useful dating signal.
• Crystal opal — transparent to translucent body with colour throughout.
• Boulder opal — a thin seam of opal still attached to its host ironstone, which is left on for strength.
• Fire opal — orange to red body colour, usually Mexican, often faceted and frequently with no play-of-colour at all.

Solid, doublet or triplet

This distinction affects value enormously and is easy to miss in a setting.

A solid opal is one piece of stone. A doublet is a thin slice of opal glued to a dark backing to intensify colour. A triplet adds a clear quartz or glass cap on top for protection.

Doublets and triplets are worth a small fraction of solid stones, and they have a fatal weakness: the adhesive layer. Water penetrates it, the layers separate, and the stone develops a cloudy or milky look that cannot be repaired.

To check, look at the stone from the side. A visible straight line where dark backing meets colour indicates an assembled stone. In a closed-back antique setting this may be impossible to see — which is exactly why you should ask.

Care, which is not optional

Opal sits at 5.5–6.5 on the Mohs scale, softer than window glass and far softer than the quartz dust in ordinary household grit. Our hardness guide explains what that means in daily terms: an opal ring worn continuously will abrade.

The rules:

• Never an ultrasonic cleaner, never steam. Both can crack an opal outright.
• Avoid dry heat and direct sun for long periods. Opal contains water. Lose it and the stone can craze — a network of fine internal cracks that is permanent.
• Do not store in a safe deposit box for years without thought. Very dry environments are a genuine risk. A soft pouch in a normally humid room is safer than a bank vault.
• Remove before anything physical. Doorframes, gym equipment, gardening, washing up.
• Clean with a barely damp soft cloth. No solvents, no jewelry dips.
• Never leave a doublet or triplet in water.

Buying an antique opal well

Look at the stone from several angles before anything else. Play-of-colour that disappears when you shift position — a narrow "one-directional" stone — is worth considerably less than one that fires from every direction.

Check for existing crazing by holding the stone to the light and looking into it for a fine internal web of lines. Crazing does not stop and cannot be reversed.

Examine the girdle and any exposed edges for chips. Then look at the setting: a bezel, which protects the whole perimeter, is a far better home for an opal than exposed prongs. Victorian jewelers understood this and used bezels frequently.

And be realistic about wear. An opal pendant, brooch or pair of earrings will outlive an opal ring worn daily by a wide margin. If you want an opal engagement ring — and people do, because they are beautiful — go in knowing it will need care, occasional repolishing, and a life slightly more sheltered than a sapphire's.

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