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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

Selene’s Haze Ring - Blue Opal in Sterling Silver from The Rock Space
Selene’s Haze Ring - Blue Opal in Sterling Silver from The Rock Space
Partner brand
Sky Blue Opal Ring - Sterling Silver, Size 6.5 from The Rock Space
Sky Blue Opal Ring - Sterling Silver, Size 6.5 from The Rock Space
Partner brand
Fire Opal Ring - Sterling Silver from The Rock Space
Fire Opal Ring - Sterling Silver from The Rock Space
Partner brand

Fire Opal Ring - Sterling Silver

$145.00

Unit price
per 

Three Fates Ring - Three Opal Ring in Sterling Silver from The Rock Space
Three Fates Ring - Three Opal Ring in Sterling Silver from The Rock Space
Partner brand
Opalite Carved Ring from The Rock Space
Opalite Carved Ring 7.5 from The Rock Space
20% off

Opalite Carved Ring

Regular price$30.00$23.9920% off

Unit price
per 

5 sizes
  • 7.5
  • 8
  • 9
  • 9.5
  • 10.5
Dendritic Opal Sphere Unique #7- 4 1/8" from The Rock Space
Dendritic Opal Sphere Unique #7- 4 1/8" from The Rock Space

Dendritic Opal Sphere Unique #7- 4 1/8"

$439.00

Unit price
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.