92.35ct Natural Koroit Boulder Opal Large Teardrop front face view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop angled view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop back view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop detail view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop detail view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop detail view Australian opal gemstone Opal Galaxy product image
92.35ct Natural Koroit Boulder Opal Large Teardrop detail view Australian opal gemstone Opal Galaxy product image

This 92.35ct natural boulder opal from Koroit, Queensland, Australia represents nature's most spectacular artistry, delivering breathtaking beauty in every glance.
This stunning gemstone bursts with blue fire that is mesmerizing and vibrant from every angle against the natural ironstone matrix.
Expertly shaped to showcase the natural boulder opal formation, this opal captures both geological wonder and visual brilliance, making it symbolic and perfect for statement jewelry.

This collectors grade gemstone showcases a mesmerizing play of color sourced directly from the world renowned Koroit mines in Queensland.
The authentic Australian boulder opal displays flashes of brilliant blue hues that shift and dance with every movement.
This one of a kind treasure adds a unique and meaningful touch, ideal for rings and pendants, perfect for custom jewelry making.

This 100% natural boulder opal only from Koroit, Queensland, Australia ensures long lasting beauty and value through its untreated nature.
Whether you're a gemstone collector, boulder opal enthusiast, or someone searching for a high grade Australian opal, this Koroit specimen is a perfect match.

As October birthstone, this solid Australian boulder opal serves as a gem of inspiration and passion that transcends ordinary jewelry.
Australian boulder opals from Koroit are considered among the most unique opals in the world, and this impressive masterpiece demonstrates exactly why collectors treasure these extraordinary gems. 

Add a piece of Koroit magic to your collection. This boulder opal is truly one in the universe.

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.

Add to Wishlist

92.35ct Natural Koroit Boulder Opal Large Teardrop

AU$461

In stock

Details

Dimension:

40x28x10 mm

Weight:

92.35ct

Type:

Natural Solid Untreated Boulder Opal

Source:

Koroit, QLD, Australia

Sku:

KK28

This 92.35ct natural boulder opal from Koroit, Queensland, Australia represents nature's most spectacular artistry, delivering breathtaking beauty in every glance.
This stunning gemstone bursts with blue fire that is mesmerizing and vibrant from every angle against the natural ironstone matrix.
Expertly shaped to showcase the natural boulder opal formation, this opal captures both geological wonder and visual brilliance, making it symbolic and perfect for statement jewelry.

This collectors grade gemstone showcases a mesmerizing play of color sourced directly from the world renowned Koroit mines in Queensland.
The authentic Australian boulder opal displays flashes of brilliant blue hues that shift and dance with every movement.
This one of a kind treasure adds a unique and meaningful touch, ideal for rings and pendants, perfect for custom jewelry making.

This 100% natural boulder opal only from Koroit, Queensland, Australia ensures long lasting beauty and value through its untreated nature.
Whether you're a gemstone collector, boulder opal enthusiast, or someone searching for a high grade Australian opal, this Koroit specimen is a perfect match.

As October birthstone, this solid Australian boulder opal serves as a gem of inspiration and passion that transcends ordinary jewelry.
Australian boulder opals from Koroit are considered among the most unique opals in the world, and this impressive masterpiece demonstrates exactly why collectors treasure these extraordinary gems. 

Add a piece of Koroit magic to your collection. This boulder opal is truly one in the universe.

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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