October birthstone

October birthstone: Opal

Opal is the stone of hope, creativity, innocence and inspiration. Here's its color, history, care and what to look for when you buy.

Opal gemstone
Color
White, black, boulder and fire opal
Hardness
5.5–6.5 Mohs
Meaning
hope, creativity, innocence and inspiration
Found in
Australia (about 95% of the world's supply), Ethiopia, Mexico (fire opal) and Brazil
Anniversary
14th
Alternates
tourmaline
Birth flower
Marigold and Cosmos

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Opal colors

White, black, boulder and fire opal. The rainbow "play-of-color" is caused by tiny silica spheres that split light.

History & meaning

The Romans thought opal held the powers of every colored gem. A 19th-century Walter Scott novel gave opals an undeserved reputation for bad luck, until Queen Victoria wore them proudly. Pink tourmaline, which comes in every color, is October's second birthstone.

Caring for opal

Soft, and it can crack if it dries out or heats up suddenly. Protective settings are best. Never use ultrasonic cleaners.

What opal costs

Ethiopian white opal is affordable. Australian black opal with bright red flashes is among the most valuable gems.

Read the full opal guide →

October birthstone jewelry

Necklaces, rings and bracelets in opal, plus how to pick a setting that suits a 5.5–6.5-hardness stone.

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Questions, answered

What is the October birthstone?

The October birthstone is Opal. Alternate October birthstones are tourmaline.

What color is the October birthstone?

White, black, boulder and fire opal. The rainbow "play-of-color" is caused by tiny silica spheres that split light.

What does opal mean?

Opal symbolizes hope, creativity, innocence and inspiration.

Is opal good for everyday rings?

Opal rates 5.5–6.5 on the Mohs hardness scale. Soft, and it can crack if it dries out or heats up suddenly. Protective settings are best. Never use ultrasonic cleaners.

How much does opal cost?

Ethiopian white opal is affordable. Australian black opal with bright red flashes is among the most valuable gems.

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