12.7ct Natural Boulder Opal Blue Green front face view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green angled view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green angle view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green side view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green back view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green detail view Australian opal gemstone Opal Galaxy product image
12.7ct Natural Boulder Opal Blue Green detail view Australian opal gemstone Opal Galaxy product image

This 12.7ct Natural Boulder Opal from Winton, Australia displays bold blue and green hues swirling through a half-moon freeform surface. The galaxy-like pattern, punctuated by earthy matrix inclusions, creates the illusion of cosmic depth and movement. Polished to a high sheen, this opal is ideal for collectors and statement jewelry alike.

Features & Benefits:
100% Natural Solid Boulder Opal Ethically sourced from Winton, Australia
Blue-Green Galaxy Pattern Nebula-like flashes create interstellar depth and drama
Polished Half-Moon Unique freeform cut suited for standout design pieces
Statement Size 12.7ct, ideal for centerpiece pendants or gemstone collections
October Birthstone A meaningful and timeless gift option
Symbol of Creativity, Love & Good Fortune A one-of-a-kind gift for dreamers and visionaries

Check more Ocean Blue Opal Collection
Watch more opals on our YouTube Channel

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.

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12.7ct Natural Boulder Opal Blue Green

AU$1,269

In stock

Details

Dimension:

25x13x5 mm

Weight:

12.7 ct

Type:

Natural Solid Untreated Boulder Opal

Source:

Winton, QLD, Australia

Sku:

XX1561

This 12.7ct Natural Boulder Opal from Winton, Australia displays bold blue and green hues swirling through a half-moon freeform surface. The galaxy-like pattern, punctuated by earthy matrix inclusions, creates the illusion of cosmic depth and movement. Polished to a high sheen, this opal is ideal for collectors and statement jewelry alike.

Features & Benefits:
100% Natural Solid Boulder Opal Ethically sourced from Winton, Australia
Blue-Green Galaxy Pattern Nebula-like flashes create interstellar depth and drama
Polished Half-Moon Unique freeform cut suited for standout design pieces
Statement Size 12.7ct, ideal for centerpiece pendants or gemstone collections
October Birthstone A meaningful and timeless gift option
Symbol of Creativity, Love & Good Fortune A one-of-a-kind gift for dreamers and visionaries

Check more Ocean Blue Opal Collection
Watch more opals on our YouTube Channel

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.

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