Natural crystal boulder opal 4.68 ct rectangular cabochon on a black background showing blue purple fire and a glossy finish.
Natural crystal boulder opal 4.68 ct rectangular cabochon held in fingers showing soft pink and blue flashes.
Side view of natural crystal boulder opal 4.68 ct rectangle cabochon showing the low dome and polished edge.
Back view of natural crystal boulder opal 4.68 ct held in fingers showing the natural base and rectangle shape.
DSC9301

This 4.68ct natural crystal boulder opal from Australia glows with a subtle, mystical interplay of purple and blue hues. Its elongated rectangular shape and smooth, polished surface give it a glassy clarity with a soft inner fire that shifts in the light. Understated yet entrancing, this opal is ideal for sleek modern pendants or distinctive one-of-a-kind jewelry creations.

Features & Benefits:
100% Natural Solid Opal Ethically sourced from Australia
Vivid Play-of-Color Gentle purple and blue sheen under the surface
Versatile Use Perfect for pendant, minimalist jewelry, or keepsake
Unique Rectangle Cut Offers modern lines with a translucent glow
Smooth Polished Surface Ready for setting in custom designs
October Birthstone A meaningful and thoughtful gift
Australian Treasure A one-of-a-kind collectors opal

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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4.68ct Natural Crystal Boulder Opal

AU$326

In stock

Details

Dimension:

17x17x5ย mm

Weight:

4.68ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

PP404

This 4.68ct natural crystal boulder opal from Australia glows with a subtle, mystical interplay of purple and blue hues. Its elongated rectangular shape and smooth, polished surface give it a glassy clarity with a soft inner fire that shifts in the light. Understated yet entrancing, this opal is ideal for sleek modern pendants or distinctive one-of-a-kind jewelry creations.

Features & Benefits:
100% Natural Solid Opal Ethically sourced from Australia
Vivid Play-of-Color Gentle purple and blue sheen under the surface
Versatile Use Perfect for pendant, minimalist jewelry, or keepsake
Unique Rectangle Cut Offers modern lines with a translucent glow
Smooth Polished Surface Ready for setting in custom designs
October Birthstone A meaningful and thoughtful gift
Australian Treasure A one-of-a-kind collectors opal

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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