Natural 35.7ct boulder opal pendant in silver showing ironstone matrix with bright green and blue flashes across a freeform opal
Australian boulder opal pendant necklace worn on model, featuring vibrant green and blue matrix colorplay in a polished solid opal set horizontally in sterling silver. Natural untreated opal October birthstone jewelry.
Back view of Australian boulder opal pendant displaying natural ironstone host rock in sterling silver setting. Solid untreated boulder opal necklace.
35.7ct natural Australian boulder opal pendant showing bright green and blue matrix pattern across ironstone, set in a horizontal sterling silver frame. Solid untreated opal necklace.

This 35.7ct natural boulder opal pendant necklace is set horizontally in 925 sterling silver, showcasing a striking blue and green matrix pattern across a polished elongated cabochon. The side to side orientation creates a clean, structured profile that rests smoothly along the neckline.

Measuring approximately 13.5 x 26 x 4 mm, this solid Australian boulder opal features vibrant green flashes interwoven with bright blue fire through natural ironstone matrix. The horizontal sterling silver setting follows the length of the stone, emphasising its natural pattern and balanced proportions.

Finished with an adjustable 18 inch sterling silver chain, this genuine Australian opal necklace is ready to wear immediately. Ideal for those seeking a blue green matrix boulder opal pendant with refined presence and contemporary styling.

A meaningful October birthstone gift or distinctive Australian opal jewelry piece.

100% natural untreated solid boulder opal. Not a doublet or triplet.

Browse all opal pendants or contact us with questions.

ย 

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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Boulder Opal Pendant Sterling Silver 35.7ct

AU$653

In stock

Details

Dimension:

13.5 x 26 x 4 mm

Weight:

35.7ctw (Pendant and Necklace)

Type:

Natural Solid Untreated Boulder Opal

Source:

Winton, QLD, Australia

Sku:

NN703

Notes

Necklace: 18 inch (slightly adjustable)
Metal: 925 sterling silver pendant and necklace (stamped)

This 35.7ct natural boulder opal pendant necklace is set horizontally in 925 sterling silver, showcasing a striking blue and green matrix pattern across a polished elongated cabochon. The side to side orientation creates a clean, structured profile that rests smoothly along the neckline.

Measuring approximately 13.5 x 26 x 4 mm, this solid Australian boulder opal features vibrant green flashes interwoven with bright blue fire through natural ironstone matrix. The horizontal sterling silver setting follows the length of the stone, emphasising its natural pattern and balanced proportions.

Finished with an adjustable 18 inch sterling silver chain, this genuine Australian opal necklace is ready to wear immediately. Ideal for those seeking a blue green matrix boulder opal pendant with refined presence and contemporary styling.

A meaningful October birthstone gift or distinctive Australian opal jewelry piece.

100% natural untreated solid boulder opal. Not a doublet or triplet.

Browse all opal pendants or contact us with questions.

ย 

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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