Blue green aqua Australian boulder opal heart pendant set in sterling silver necklace 25.8ct
Australian boulder opal heart pendant necklace with blue green aqua color worn on sterling silver chain.
Natural Australian boulder opal heart pendant with blue green aqua ocean color set in sterling silver necklace 25.8ct.
Back view of natural Australian boulder opal heart pendant showing ironstone backing sterling silver setting.
Blue green aqua Australian heart shaped boulder opal pendant set in sterling silver necklace 25.8ct.
Chain and Adjustable Rope Necklace Options

Natural solid Australian boulder opal heart pendant set in sterling silver featuring vibrant blue and green fire from Winton Queensland Australia. The gemstone is cut as a heart shaped polished cabochon and mounted in a 925 sterling silver bezel pendant setting.

About Australian Boulder Opal

Boulder opal is one of the most distinctive gemstones found in Queensland Australia. Unlike other opals, boulder opal forms naturally attached to ironstone which provides strength and a natural dark backing that enhances the vivid play of color.

This opal displays vibrant blue and green fire that shifts beautifully as light moves across the surface, creating the natural color play that Australian opals are famous for.


Opal Pendant Jewelry

The heart shape creates an elegant opal heart pendant necklace that sits beautifully on the neckline. The sterling silver setting frames the gemstone while allowing the natural blue green color of the opal to remain the focus.

October Birthstone Opal

Australian opal is the traditional October birthstone and is often chosen for meaningful birthstone jewelry. Opal necklaces are also popular as anniversary gifts and romantic jewelry pieces because of their vibrant natural color patterns.

Each natural opal displays its own individual color pattern, making every piece of opal jewelry one of a kind.

Authenticity

100% natural solid Australian opal. No treatments. No doublets or triplets.

Learn more: Our Boulder Opal Guide | Opal Pendant Care |ย Australian Opal Buying Guide

Explore more Australian boulder opal pendants in our Boulder Opal Pendant collectionย or contact us with questions.

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariffย 

USA customers do not need to pay any tariffs on their purchase. Opal Galaxy covers all tariff charges to the USA, with no additional government fees added after checkout.

Delivery Status

USA: No delays
Asia: No delays
UK: Minor delays possible (Complimentary EMS Express upgrade)
Europe: Minor delays possible (Complimentary EMS Express upgrade)
Middle East: Shipping temporarily suspended - Please contact us to discuss shipping arrangements before purchase.

Shipping Information

All shipping includes complimentary insurance.

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 $100 FedEx Shipping Upgrade under $3999

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 Heart Pendant Sterling Silver Blue Green 25.8ct

US$870

Details

Dimension:

17.9 x 21.2 x 7.8 mm

Weight:

25.8ctw (Pendant without Necklace)

Type:

Natural Solid Untreated Boulder Opal

Source:

Winton, QLD, Australia

Sku:

NN638

Notes

Pendant: 925 sterling silver pendant (stamped)

Natural solid Australian boulder opal heart pendant set in sterling silver featuring vibrant blue and green fire from Winton Queensland Australia. The gemstone is cut as a heart shaped polished cabochon and mounted in a 925 sterling silver bezel pendant setting.

About Australian Boulder Opal

Boulder opal is one of the most distinctive gemstones found in Queensland Australia. Unlike other opals, boulder opal forms naturally attached to ironstone which provides strength and a natural dark backing that enhances the vivid play of color.

This opal displays vibrant blue and green fire that shifts beautifully as light moves across the surface, creating the natural color play that Australian opals are famous for.


Opal Pendant Jewelry

The heart shape creates an elegant opal heart pendant necklace that sits beautifully on the neckline. The sterling silver setting frames the gemstone while allowing the natural blue green color of the opal to remain the focus.

October Birthstone Opal

Australian opal is the traditional October birthstone and is often chosen for meaningful birthstone jewelry. Opal necklaces are also popular as anniversary gifts and romantic jewelry pieces because of their vibrant natural color patterns.

Each natural opal displays its own individual color pattern, making every piece of opal jewelry one of a kind.

Authenticity

100% natural solid Australian opal. No treatments. No doublets or triplets.

Learn more: Our Boulder Opal Guide | Opal Pendant Care |ย Australian Opal Buying Guide

Explore more Australian boulder opal pendants in our Boulder Opal Pendant collectionย or contact us with questions.

Shipping Updates - March 2026

Latest international delivery information from Australia Post and FedEx.

USA Tariffย 

USA customers do not need to pay any tariffs on their purchase. Opal Galaxy covers all tariff charges to the USA, with no additional government fees added after checkout.

Delivery Status

USA: No delays
Asia: No delays
UK: Minor delays possible (Complimentary EMS Express upgrade)
Europe: Minor delays possible (Complimentary EMS Express upgrade)
Middle East: Shipping temporarily suspended - Please contact us to discuss shipping arrangements before purchase.

Shipping Information

All shipping includes complimentary insurance.

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 $100 FedEx Shipping Upgrade under $3999

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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