Natural crystal boulder opal close up showing intense red green and blue mosaic fire with orange flashes.
Natural crystal boulder opal showing bright red green and blue fire in a rectangular freeform cut.
Natural crystal boulder opal shown on fingers to show size with strong multicolor fire across the face.
Natural crystal boulder opal side profile showing the crystal layer and ironstone backing.
Natural crystal boulder opal angled back view showing the ironstone base and rectangular body shape.
Natural crystal boulder opal back view showing natural ironstone with a smooth polished finish.
Natural crystal boulder opal face view with vivid red green and blue color play in a rectangular shape.

This striking 12.47ct natural crystal pipe boulder opal from Winton, Australia displays an intense multicolor fire embedded within its host rock. Vivid flashes of orange, green, and blue sparkle through the semi-translucent opal channels, creating a dramatic contrast against the earthy sandstone matrix. Its natural rectangular form and polished surface make it an exceptional collector's piece or a bold, rustic centerpiece for artistic jewelry.

Features & Benefits:
100% Natural Pipe Crystal Opal Ethically sourced from Australia
Vivid Play-of-Color green, orange, and blue in crystal veins
Pipe Boulder Structure A formation with opal growing through ironstone
Rectangle Cut Strong geometric form for bold designs
Smooth Polished Surface Natural matrix with opal fire exposed
October Birthstone A meaningful and vibrant gift
Australian Treasure An impressive specimen for collectors or custom jewelry

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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12.47ct Natural Australian Crystal Boulder Opal

AU$599

In stock

Details

Dimension:

18x12x.6.5 mm

Weight:

12.47ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

PP508

This striking 12.47ct natural crystal pipe boulder opal from Winton, Australia displays an intense multicolor fire embedded within its host rock. Vivid flashes of orange, green, and blue sparkle through the semi-translucent opal channels, creating a dramatic contrast against the earthy sandstone matrix. Its natural rectangular form and polished surface make it an exceptional collector's piece or a bold, rustic centerpiece for artistic jewelry.

Features & Benefits:
100% Natural Pipe Crystal Opal Ethically sourced from Australia
Vivid Play-of-Color green, orange, and blue in crystal veins
Pipe Boulder Structure A formation with opal growing through ironstone
Rectangle Cut Strong geometric form for bold designs
Smooth Polished Surface Natural matrix with opal fire exposed
October Birthstone A meaningful and vibrant gift
Australian Treasure An impressive specimen for collectors or custom jewelry

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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