Crystal opal 17.8 ct freeform pipe opal on a black background showing bright blue green fire and clean polish.
Crystal opal 17.8 ct freeform pipe opal held in fingers showing bright blue green and purple fire.
Crystal opal 17.8 ct freeform pipe opal on a fingertip showing size and bright rainbow flashes.
Side angle of crystal opal 17.8 ct freeform pipe opal showing a smooth dome and strong color play.
Crystal opal 17.8 ct bright fire freeform pipe opal on a black background video cover image.

This crystal boulder opal from Queensland shows bright green, blue, and purple fire moving across its soft translucent body in sweeping waves. The colors shift from aqua and turquoise into lavender and violet, creating a cool, serene palette that changes beautifully as you turn the stone. The freeform shape follows the natural contours of how the opal formed, giving it an organic, artistic quality that makes it feel more unique than standard geometric cuts.

At 14.2 x 6.8 x 3 mm and weighing 1.78 carats, this elongated freeform crystal opal has a sleek profile that works especially well for pendants where the narrow shape creates an elegant vertical line. The bright fire stands out nicely against the pastel body tone, making it more eye catching than typical soft pastel opals while still keeping that gentle, approachable look. It would look great in custom jewelry settings with sterling silver for everyday pieces, or gold for something more polished.

This is completely natural solid opal with no treatment, keeping its ironstone backing intact. Not a doublet or triplet, just authentic crystal boulder opal from Australia. The combination of bright color and freeform shape gives it character and individuality, which appeals to people looking for something that stands out from cookie cutter jewelry. The elongated proportions make it feel modern and contemporary.

As the official opal October birthstone, this stone represents creativity and hope. The cool green, blue, and purple tones give it a peaceful, calming energy that works for both daily wear and special occasions. For anyone wanting authentic Australian opal with bright fire and a unique freeform shape, this crystal boulder offers quality at a friendly price.

This crystal boulder opal will arrive securely packaged in an Opal Galaxy luxury gift box, ready for professional jewelry setting or safe storage.

Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $4000
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $80 FedEx Shipping Upgrade under $3999

All shipping includes complimentary insurance.
Please view ourย Shipping Policyย page for more information.

7 day return and refund policy.
Please view ourย Return and Refundย page for more information.

We offer a lifetime guarantee for natural cracks that may form in our opals.
There is a very low chance that this can happen, however occasionally it might.
Our guarantee excludes any opals sold with existing fractures.
Please view our Terms and Conditions.

Caring for Your Australian Opal

Opal Jewelry

Important: Opals Are Fragile Gemstones
Opals are softer than sapphires, rubies, or diamonds and will crack or chip if struck hard against solid surfaces.

Always remove opal jewelry before:
Sports or physical activities
Manual labor, gardening, or gym workouts
Household tasks where impact is possible (lifting, moving furniture, etc.)

Even a minor knock during everyday wear can cause permanent damage. Treat opals as delicate gemstones, not everyday workwear.

Cleaning Your Opal

Clean with warm water and mild soap. Avoid harsh chemicals like bleach, ammonia, or chlorine. Light exposure to hand soap or dishwashing detergent is safe.

Storage

Store opal jewelry separately from harder gemstones (diamonds, sapphires) to prevent scratching.

Solid Natural Opals

(Black, Boulder, Crystal, White Opal)
Natural solid opals are stable and won't change color or crack from water, humidity, or temperature changes. They are safe to submerge in water and can be worn daily, provided they are protected from physical impact. Solid opals are a single piece of gemstone with no artificial backing, making them ideal for heirloom quality jewelry when handled with care.

Opal Doublets

Opal doublets consist of a thin slice of natural opal bonded to a dark backing. Do not submerge doublets in water as prolonged exposure can weaken the adhesive bond and cause separation or cloudiness. Remove doublet jewelry before swimming, bathing, or washing dishes. Clean with a damp cloth only; do not soak or use ultrasonic cleaners.

Like all opals, doublets are fragile and must be protected from impact.

Not sure which type you have? Solid opals show natural color throughout the stone. Doublets have a visible dark backing layer when viewed from the side.

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1.78ct Crystal Opal Green Blue Fire

189

In stock

Details

Dimension:

11.8 x 7.8 x 2.7 mm

Weight:

1.48ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

XX1911

This crystal boulder opal from Queensland shows bright green, blue, and purple fire moving across its soft translucent body in sweeping waves. The colors shift from aqua and turquoise into lavender and violet, creating a cool, serene palette that changes beautifully as you turn the stone. The freeform shape follows the natural contours of how the opal formed, giving it an organic, artistic quality that makes it feel more unique than standard geometric cuts.

At 14.2 x 6.8 x 3 mm and weighing 1.78 carats, this elongated freeform crystal opal has a sleek profile that works especially well for pendants where the narrow shape creates an elegant vertical line. The bright fire stands out nicely against the pastel body tone, making it more eye catching than typical soft pastel opals while still keeping that gentle, approachable look. It would look great in custom jewelry settings with sterling silver for everyday pieces, or gold for something more polished.

This is completely natural solid opal with no treatment, keeping its ironstone backing intact. Not a doublet or triplet, just authentic crystal boulder opal from Australia. The combination of bright color and freeform shape gives it character and individuality, which appeals to people looking for something that stands out from cookie cutter jewelry. The elongated proportions make it feel modern and contemporary.

As the official opal October birthstone, this stone represents creativity and hope. The cool green, blue, and purple tones give it a peaceful, calming energy that works for both daily wear and special occasions. For anyone wanting authentic Australian opal with bright fire and a unique freeform shape, this crystal boulder offers quality at a friendly price.

This crystal boulder opal will arrive securely packaged in an Opal Galaxy luxury gift box, ready for professional jewelry setting or safe storage.

Registered Shipping $15 under $200
Free Registered Shipping over $201
Free Worldwide EMS Express Shipping over $1000
Free Worldwide FedEx Shipping over $4000
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $80 FedEx Shipping Upgrade under $3999

All shipping includes complimentary insurance.
Please view ourย Shipping Policyย page for more information.

7 day return and refund policy.
Please view ourย Return and Refundย page for more information.

We offer a lifetime guarantee for natural cracks that may form in our opals. There is a very low chance that this can happen, however occasionally it might. Our guarantee excludes any opals sold with existing fractures.
Please view our Terms and Conditions.

Caring for Your Australian Opal

Opal Jewelry

Important: Opals Are Fragile Gemstones
Opals are softer than sapphires, rubies, or diamonds and will crack or chip if struck hard against solid surfaces.

Always remove opal jewelry before:
Sports or physical activities
Manual labor, gardening, or gym workouts
Household tasks where impact is possible (lifting, moving furniture, etc.)

Even a minor knock during everyday wear can cause permanent damage. Treat opals as delicate gemstones, not everyday workwear.

Cleaning Your Opal

Clean with warm water and mild soap. Avoid harsh chemicals like bleach, ammonia, or chlorine. Light exposure to hand soap or dishwashing detergent is safe.

Storage

Store opal jewelry separately from harder gemstones (diamonds, sapphires) to prevent scratching.

Solid Natural Opals

(Black, Boulder, Crystal, White Opal)
Natural solid opals are stable and won't change color or crack from water, humidity, or temperature changes. They are safe to submerge in water and can be worn daily, provided they are protected from physical impact. Solid opals are a single piece of gemstone with no artificial backing, making them ideal for heirloom quality jewelry when handled with care.

Opal Doublets

Opal doublets consist of a thin slice of natural opal bonded to a dark backing. Do not submerge doublets in water as prolonged exposure can weaken the adhesive bond and cause separation or cloudiness. Remove doublet jewelry before swimming, bathing, or washing dishes. Clean with a damp cloth only; do not soak or use ultrasonic cleaners.

Like all opals, doublets are fragile and must be protected from impact.

Not sure which type you have? Solid opals show natural color throughout the stone. Doublets have a visible dark backing layer when viewed from the side.

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