Natural crystal boulder opal full face view on a black background showing vivid green fire with hints of yellow and orange.
Natural crystal boulder opal shown on a hand for scale with a soft crystal body tone and lively green multicolor fire.
Natural crystal boulder opal held on fingers showing size and a pastel body tone with green and blue color play.
Natural crystal boulder opal face view with bright green flashes and scattered multicolor pinfire across the surface.
Natural crystal boulder opal side profile showing a low to medium dome with visible crystal layer and soft multicolor fire.
Natural crystal boulder opal back view showing the ironstone matrix and natural host rock.

Rainbow Crystal Boulder Opal for Jewelry, Ring, Necklace, Pendant. Natural Solid Untreated Genuine Crystal Boulder Opal Loose Stone From Winton, QLD, Australia

This dazzling 6.4ct crystal boulder opal from Winton boasts a freeform shape and vibrant rainbow fire. Vivid splashes of neon green, orange, pink, and violet dance across its polished surface, creating a brilliant spectacle in any light. Its translucent body gives depth to the play-of-color, while its generous size offers a bold statement piece for artistic jewelry.

Features & Benefits:
100% Natural & Untreated Ethically mined from Winton, QLD
Spectacular Rainbow Fire Green, orange, purple & pink flashes
Freeform Shape A unique silhouette perfect for creative custom work
Translucent Crystal Base Enhances color vibrancy and visual depth
Smooth Polished Surface Ready to mount in a pendant or ring
October Birthstone Deeply meaningful and magical
Collector's Gem Eye-catching size and fiery personality

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 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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6.4ct Natural Crystal Boulder Opal

AU$2,812

In stock

Details

Dimension:

19x12x4 mm

Weight:

6.4ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

PP116

Rainbow Crystal Boulder Opal for Jewelry, Ring, Necklace, Pendant. Natural Solid Untreated Genuine Crystal Boulder Opal Loose Stone From Winton, QLD, Australia

This dazzling 6.4ct crystal boulder opal from Winton boasts a freeform shape and vibrant rainbow fire. Vivid splashes of neon green, orange, pink, and violet dance across its polished surface, creating a brilliant spectacle in any light. Its translucent body gives depth to the play-of-color, while its generous size offers a bold statement piece for artistic jewelry.

Features & Benefits:
100% Natural & Untreated Ethically mined from Winton, QLD
Spectacular Rainbow Fire Green, orange, purple & pink flashes
Freeform Shape A unique silhouette perfect for creative custom work
Translucent Crystal Base Enhances color vibrancy and visual depth
Smooth Polished Surface Ready to mount in a pendant or ring
October Birthstone Deeply meaningful and magical
Collector's Gem Eye-catching size and fiery personality

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 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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