Crystal opal 15.3 ct oval pipe opal front view showing a strong blue green glow and clean polish.
Side view of the crystal opal 15.3 ct oval pipe opal showing the dome shape and blue green color.
Crystal opal 15.3 ct on a fingertip to show size with soft green blue color and a clear body.
Crystal opal 15.3 ct oval pipe opal showing bright green and blue color on a black background.

This crystal boulder opal from Queensland shows vibrant green and blue fire concentrated at the top, gradually fading into soft pastel tones toward the base. Electric turquoise and aqua mix with flashes of purple and pink, creating a gradient effect that makes the stone feel dynamic and alive. This is pipe opal, formed in vertical tubes underground, which gives it that extra translucent, glassy quality where the colors really glow from within.

Measuring 13.5 x 6 x 3 mm and weighing 1.53 carats, this elongated oval crystal opal has a sleek, narrow profile that works beautifully for rings where it sits elegantly on the finger, or pendants where the vertical shape creates a graceful line. The bright fire at the top draws the eye while the softer base keeps it balanced and wearable. It would look great in custom jewelry settings with sterling silver for modern everyday pieces, or gold for a more refined look.

This is completely natural solid opal with no treatment, keeping its ironstone backing intact. Not a doublet or triplet, just authentic Queensland crystal boulder opal from a pipe deposit. The gradient from bright fire to pastel tones gives it visual interest and depth you don't see in opals with uniform color. The pipe opal formation means light passes through the stone instead of just bouncing off, which makes the colors more luminous.

As the official opal October birthstone, this stone represents hope and creativity. The vibrant colors combined with the elegant oval shape make it perfect for both statement pieces and delicate designs. For anyone wanting authentic Australian opal with bright fire and a versatile 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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1.53ct Crystal Opal Green Blue Fire

AU$328

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:

XX1912

This crystal boulder opal from Queensland shows vibrant green and blue fire concentrated at the top, gradually fading into soft pastel tones toward the base. Electric turquoise and aqua mix with flashes of purple and pink, creating a gradient effect that makes the stone feel dynamic and alive. This is pipe opal, formed in vertical tubes underground, which gives it that extra translucent, glassy quality where the colors really glow from within.

Measuring 13.5 x 6 x 3 mm and weighing 1.53 carats, this elongated oval crystal opal has a sleek, narrow profile that works beautifully for rings where it sits elegantly on the finger, or pendants where the vertical shape creates a graceful line. The bright fire at the top draws the eye while the softer base keeps it balanced and wearable. It would look great in custom jewelry settings with sterling silver for modern everyday pieces, or gold for a more refined look.

This is completely natural solid opal with no treatment, keeping its ironstone backing intact. Not a doublet or triplet, just authentic Queensland crystal boulder opal from a pipe deposit. The gradient from bright fire to pastel tones gives it visual interest and depth you don't see in opals with uniform color. The pipe opal formation means light passes through the stone instead of just bouncing off, which makes the colors more luminous.

As the official opal October birthstone, this stone represents hope and creativity. The vibrant colors combined with the elegant oval shape make it perfect for both statement pieces and delicate designs. For anyone wanting authentic Australian opal with bright fire and a versatile 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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