Crystal boulder opal 13.9 ct oval cabochon close view on black showing purple blue and green fire with a smooth polish.
Crystal boulder opal 13.9 ct oval cabochon held in fingers showing purple blue and green color play with a glossy dome.
Crystal boulder opal 13.9 ct oval on fingertips to show size with purple blue and green color play across the face.
Crystal boulder opal 13.9 ct oval cabochon on black showing purple and blue fire with soft green flashes and natural boulder edge.

This 13.9ct natural solid crystal boulder opal from Queensland displays neon purple and blue fire with sparkling green pinfire across its translucent body. This gemstone combines crystal transparency with sandstone backing, creating an electric effect where vibrant purple and blue colors dominate the surface with bright green accents. The intense neon colors create eye catching appeal perfect for bold, contemporary jewelry designs.

Expertly cut and polished into an oval cabochon measuring 23.3 x 13.5 x 7.7 mm, this natural gemstone offers substantial proportions perfect for statement pieces. The translucent quality allows light to pass through, creating depth and brilliance that changes throughout the day. This size works beautifully for large sterling silver pendants where the electric purple blue can be the focal point, or set in yellow gold or rose gold for warm contrast against the cool neon tones. The bold colors work well for modern jewelry designs that emphasize vibrant color and contemporary aesthetics.

Completely natural and untreated, this is genuine solid Australian crystal boulder opal, not a doublet or triplet. The authentic Queensland origin guarantees you are receiving a natural gemstone with sandstone backing that crystal boulder opals are known for. The neon purple and blue coloring with green pinfire creates more visual interest than typical green only stones, making this piece appealing for those seeking bold color. The 7.7mm depth provides good structure for secure settings in pendants or occasional wear rings.

As the official Opal October birthstone, this natural gemstone carries symbolic meanings of creativity, passion, and inspiration. The electric purple and blue create a vibrant, energetic aesthetic perfect for statement jewelry that emphasizes bold color. This accessible stone offers impressive neon fire at a friendly price point.

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

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariffย 

USA customers do not need to pay any tariffs on their purchase. Opal Galaxy covers all tariff charges to the USA, with no additional government fees added after checkout.

Delivery Status

USA: No delays
Asia: No delays
UK: Minor delays possible (Complimentary EMS Express upgrade)
Europe: Minor delays possible (Complimentary EMS Express upgrade)
Middle East: Shipping temporarily suspended - Please contact us to discuss shipping arrangements before purchase.

Shipping Information

All shipping includes complimentary insurance.

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 $100 FedEx Shipping Upgrade under $3999

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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13.9ct Crystal Boulder Opal

AU$2,121

In stock

Details

Dimension:

23.3 ร— 13.5 ร— 7.7 mm

Weight:

13.9 ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

XX1896

This 13.9ct natural solid crystal boulder opal from Queensland displays neon purple and blue fire with sparkling green pinfire across its translucent body. This gemstone combines crystal transparency with sandstone backing, creating an electric effect where vibrant purple and blue colors dominate the surface with bright green accents. The intense neon colors create eye catching appeal perfect for bold, contemporary jewelry designs.

Expertly cut and polished into an oval cabochon measuring 23.3 x 13.5 x 7.7 mm, this natural gemstone offers substantial proportions perfect for statement pieces. The translucent quality allows light to pass through, creating depth and brilliance that changes throughout the day. This size works beautifully for large sterling silver pendants where the electric purple blue can be the focal point, or set in yellow gold or rose gold for warm contrast against the cool neon tones. The bold colors work well for modern jewelry designs that emphasize vibrant color and contemporary aesthetics.

Completely natural and untreated, this is genuine solid Australian crystal boulder opal, not a doublet or triplet. The authentic Queensland origin guarantees you are receiving a natural gemstone with sandstone backing that crystal boulder opals are known for. The neon purple and blue coloring with green pinfire creates more visual interest than typical green only stones, making this piece appealing for those seeking bold color. The 7.7mm depth provides good structure for secure settings in pendants or occasional wear rings.

As the official Opal October birthstone, this natural gemstone carries symbolic meanings of creativity, passion, and inspiration. The electric purple and blue create a vibrant, energetic aesthetic perfect for statement jewelry that emphasizes bold color. This accessible stone offers impressive neon fire at a friendly price point.

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

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariffย 

USA customers do not need to pay any tariffs on their purchase. Opal Galaxy covers all tariff charges to the USA, with no additional government fees added after checkout.

Delivery Status

USA: No delays
Asia: No delays
UK: Minor delays possible (Complimentary EMS Express upgrade)
Europe: Minor delays possible (Complimentary EMS Express upgrade)
Middle East: Shipping temporarily suspended - Please contact us to discuss shipping arrangements before purchase.

Shipping Information

All shipping includes complimentary insurance.

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 $100 FedEx Shipping Upgrade under $3999

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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