New
374ct boulder opal rubs rough parcel of 10 pieces from Queensland, Australia with blue, teal, green, and gold fire through warm brown ironstone matrix. Natural, untreated.
374ct boulder opal rubs parcel from Queensland, Australia showing vivid blue, teal, and gold color play through natural ironstone matrix. 100% natural and untreated.
374ct boulder opal rubs rough parcel 10pc RP223 - Group Shot

Boulder Opal Rubbed

This 374 carat parcel contains 10 boulder opal rubs sourced from Queensland, Australia. The color density across this lot is well above average, with nearly every piece showing bright, saturated fire across its polished face.

The largest piece in the parcel is a wide slab displaying a dramatic wash of electric blue and teal fire that spreads across the majority of its surface, transitioning into green at the edges. This single stone is a standout piece with potential for a large finished cabochon or a collector display specimen on its own. To the right, two pieces carry vivid golden yellow and green fire with a metallic quality that catches the light from every angle. The center front piece shows a beautiful blend of teal, pink, and rainbow fire flowing through the ironstone, while the left side stones feature scattered purple, green, and multicolor pinfire through classic brown matrix patterns.

The warm brown ironstone across this parcel provides a rich natural backdrop that intensifies each flash of color. The variety in fire tones means this parcel could supply finished stones covering nearly the full color spectrum of Queensland boulder opal.

Sizes range from smaller pieces around 15mm to the large slab measuring approximately 50mm across, giving cutters options from ring stones through to statement pendants.

All 10 opals are 100% natural and completely untreated. These are not doublets or triplets. Photographs were taken wet under LED lighting. Dry appearance will differ. Price includes worldwide registered shipping.

This collection will arrive securely packaged in an Opal Galaxy gift box, making it ready for safe storage, jewelry setting, or presentation as a collector gemstone.

Learn about Opal Cutting 

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariff 

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 our Shipping Policy page for more information.

7 day return and refund policy.
Please view our Return and Refund 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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Boulder Opal Rubbed Rough Parcel 374ctw

AU$1,023

In stock

Details

Dimension:

See ruler in image

Weight:

374ctw total weight

Type:

Natural Solid Untreated Boulder Opal

Source:

Queensland, Australia

Sku:

RP223

Notes

Quantity: 10 Pieces
Opals are wet to show color and taken under LED Lighting. Price includes Worldwide Registered Shipping.

Boulder Opal Rubbed

This 374 carat parcel contains 10 boulder opal rubs sourced from Queensland, Australia. The color density across this lot is well above average, with nearly every piece showing bright, saturated fire across its polished face.

The largest piece in the parcel is a wide slab displaying a dramatic wash of electric blue and teal fire that spreads across the majority of its surface, transitioning into green at the edges. This single stone is a standout piece with potential for a large finished cabochon or a collector display specimen on its own. To the right, two pieces carry vivid golden yellow and green fire with a metallic quality that catches the light from every angle. The center front piece shows a beautiful blend of teal, pink, and rainbow fire flowing through the ironstone, while the left side stones feature scattered purple, green, and multicolor pinfire through classic brown matrix patterns.

The warm brown ironstone across this parcel provides a rich natural backdrop that intensifies each flash of color. The variety in fire tones means this parcel could supply finished stones covering nearly the full color spectrum of Queensland boulder opal.

Sizes range from smaller pieces around 15mm to the large slab measuring approximately 50mm across, giving cutters options from ring stones through to statement pendants.

All 10 opals are 100% natural and completely untreated. These are not doublets or triplets. Photographs were taken wet under LED lighting. Dry appearance will differ. Price includes worldwide registered shipping.

This collection will arrive securely packaged in an Opal Galaxy gift box, making it ready for safe storage, jewelry setting, or presentation as a collector gemstone.

Learn about Opal Cutting 

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariff 

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 our Shipping Policy page for more information.

7 day return and refund policy.
Please view our Return and Refund 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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