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Stone 101

Opal

Not even a crystal. Opal is hardened silica gel, and the rainbow comes from tiny spheres.

Opal ranges from milky blue to cherry orange to rainbow flash. Here you'll find opal rings and bracelets, dendritic opal, cherry opal, and some opalite and opal aura pieces, labelled as such.

Colour
White, blue, orange, rainbow flash
Hardness
Mohs 5.5 to 6.5
Found in
Australia, Ethiopia, Mexico
Birthstone
October
Family
Mineraloid (hydrated silica)

Shop Opal by shape

54 Results

Pippa Opal Charm Necklace from The Rock Space
Pippa Opal Charm Necklace from The Rock Space
Partner brand

Pippa Opal Charm Necklace

$43.00

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per 

Mila Opal Sun Necklace - Gold from The Rock Space
Mila Opal Sun Necklace - Gold from The Rock Space
Partner brand

Mila Opal Sun Necklace - Gold

$39.00

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Nyla Opal Star Huggie Hoops from The Rock Space
Nyla Opal Star Huggie Hoops from The Rock Space
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Nyla Opal Star Huggie Hoops

$48.00

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Oaklynn Opal Hoop Earrings from The Rock Space
Oaklynn Opal Hoop Earrings from The Rock Space
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Oaklynn Opal Hoop Earrings

$55.00

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Brea Necklace - Mint Opal Daisy from The Rock Space
Brea Necklace - Mint Opal Daisy from The Rock Space
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Brea Necklace - Mint Opal Daisy

$34.00

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per 

Penny Mini Opal Stud Earrings - Gold from The Rock Space
Penny Mini Opal Stud Earrings - Gold from The Rock Space
Partner brand

Penny Mini Opal Stud Earrings - Gold

$48.00

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per 

Novie Tiny Opal Star Stud Earrings from The Rock Space
Novie Tiny Opal Star Stud Earrings from The Rock Space
Partner brand

Novie Tiny Opal Star Stud Earrings

$33.00

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per 

Miller Opal Stud Earrings - Gold from The Rock Space
Partner brand

Miller Opal Stud Earrings - Gold

$32.00

Unit price
per 

Lou Opal Daisy Stud Earrings from The Rock Space
Lou Opal Daisy Stud Earrings from The Rock Space
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Lou Opal Daisy Stud Earrings

$70.00

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per 

Taylor Opal Clover Necklace from The Rock Space
Taylor Opal Clover Necklace from The Rock Space
Partner brand

Taylor Opal Clover Necklace

$34.00

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Desire Opal Necklace - 18" 16k Gold Plated Brass Chain from The Rock Space
Desire Opal Necklace - 18" 16k Gold Plated Brass Chain from The Rock Space
Partner brand
Adley Opal Hoop Earrings - Gold from The Rock Space
Adley Opal Hoop Earrings - Gold from The Rock Space
Partner brand

Adley Opal Hoop Earrings - Gold

$40.00

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per 

2 colors
Genevieve Opal Heart Studs from The Rock Space
Genevieve Opal Heart Studs from The Rock Space
Partner brand

Genevieve Opal Heart Studs

$45.00

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per 

CLARA Pink Opal Mandala Necklace from The Rock Space
CLARA Pink Opal Mandala Necklace from The Rock Space
Partner brand

CLARA Pink Opal Mandala Necklace

$50.00

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per 

Reese Opal Moon Necklace - Gold Plated from The Rock Space
Reese Opal Moon Necklace - Gold Plated from The Rock Space
Partner brand

Reese Opal Moon Necklace - Gold Plated

$37.00

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per 

Josie Opal Star Necklace from The Rock Space
Josie Opal Star Necklace from The Rock Space
Partner brand

Josie Opal Star Necklace

$35.00

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per 

The basics

So what is opal, really?

Opal is silica with water locked inside. It never forms a crystal grid, so geologists call it a mineraloid instead of a mineral.

In precious opal, tiny silica spheres sit in neat rows and split light into colours. Common opal, like blue, cherry and dendritic opal, glows softly instead.

Rituals, not rules

How people use it

  • It's the October birthstone, so a ring or pendant is a classic birthday gift.
  • People wear it in a ring or bracelet so the colour catches the light all day.
  • It's traditionally linked with creativity, so some folks keep a piece on the desk where they make things.

These are traditions people enjoy, not promises. Pick the one you keep coming back to.

Care

Looking after your Opal

  • Water: quick rinse only
  • A quick rinse in lukewarm water is fine. Dry it right away and never soak it.
  • Keep it away from heat, hot cars and sudden temperature changes, which can crack it.
  • It's softer than quartz, so store it apart from harder stones.

Straight talk

Real, treated or lab-made?

Opalite is man-made glass, and it's gorgeous, but it isn't opal. Opal aura is quartz with a thin metal coating. Lab-grown opal and thin slices glued to backing also exist. TRS labels every synthetic or coated piece in the title, like "(Synthetic)" or "Aura".

Good questions

Opal questions people ask us

What does opal mean?

Opal is traditionally linked with creativity, hope and self-expression. Most people just love the colour play.

Is opalite the same as opal?

No. Opalite is man-made glass with a milky blue glow. Opal is natural silica from the ground. Both are pretty, they're just different things.

Can opal go in water?

A quick rinse is fine for most opal. Dry it right after and don't soak it. Some Ethiopian opal soaks up water and goes cloudy for a while, so be extra gentle with it.

Why do opals crack?

Opal holds water. Heat, very dry air or a sudden temperature change can make it lose water fast and form fine cracks. Store it at room temperature, away from heaters.