77.7ctw natural Koroit boulder opal pair showing vivid green blue color veins
77.7ctw natural Koroit boulder opal pair held on hand showing detailed natural pattern
angled view of 77.7ctw natural Koroit boulder opal pair showing strong color play
close view of 77.7ctw natural Koroit boulder opal pair showing detailed vein pattern
side view of 77.7ctw natural Koroit boulder opal pair showing thickness and structure
back of 77.7ctw natural Koroit boulder opal pair showing natural ironstone base
front view of 77.7ctw natural Koroit boulder opal pair showing matching gemstone set

Koroit Boulder Opal Pair

This striking 77.7ctw Koroit Boulder Opal Pair from Koroit, Queensland, showcases swirling ironstone matrix veined with brilliant neon flashes of green, aqua, orange, and violet. Polished on both faces, these freeform stones mirror one another beautifully, making them ideal for custom earrings or matched pendants. Their unique organic shapes and fire-rich patterning offer both natural beauty and symmetry.

Features & Benefits:
100% Natural Solid Boulder Opals Ethically sourced from Koroit, Australia
Coordinated Pair Perfect symmetry and pattern flow for earrings or statement jewelry
Electrifying Color Play Vibrant veins of green, aqua, and violet across rich brown matrix
Freeform Shape Naturally contoured for artisan-style or bold design pieces
Collector Grade Sizable and rare, perfect for high-end custom work or investment
October Birthstone Symbol of emotional healing, inspiration, and transformation
Eligible for Payment Plan Flexibility for collectors and designers

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 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

77.7ctw Natural Koroit Boulder Opal Pair

AU$1,254

In stock

Details

Dimension:

29x24.5x5.5 mm, 26x23x7 mm

Weight:

77.7ctw

Type:

Natural Solid Untreated Boulder Opal

Source:

Koroit, QLD, Australia

Sku:

XX1299

Koroit Boulder Opal Pair

This striking 77.7ctw Koroit Boulder Opal Pair from Koroit, Queensland, showcases swirling ironstone matrix veined with brilliant neon flashes of green, aqua, orange, and violet. Polished on both faces, these freeform stones mirror one another beautifully, making them ideal for custom earrings or matched pendants. Their unique organic shapes and fire-rich patterning offer both natural beauty and symmetry.

Features & Benefits:
100% Natural Solid Boulder Opals Ethically sourced from Koroit, Australia
Coordinated Pair Perfect symmetry and pattern flow for earrings or statement jewelry
Electrifying Color Play Vibrant veins of green, aqua, and violet across rich brown matrix
Freeform Shape Naturally contoured for artisan-style or bold design pieces
Collector Grade Sizable and rare, perfect for high-end custom work or investment
October Birthstone Symbol of emotional healing, inspiration, and transformation
Eligible for Payment Plan Flexibility for collectors and designers

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 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.

Recently Viewed

Reviews