Crystal boulder opal 3.35 ct oval on a black background showing vivid blue green fire and clean polish.
Crystal boulder opal 3.35 ct on a fingertip showing bright green and pink fire with blue flashes.
Crystal boulder opal 3.35 ct on fingertips to show size with strong green fire and rainbow sparkles.
Crystal boulder opal 3.35 ct held in fingers showing green blue and pink color play across the oval face.
Side view of crystal boulder opal 3.35 ct showing the low dome and polished edge with color along the top.
Back view of crystal boulder opal 3.35 ct held in fingers showing the pale base and oval shape.
Crystal boulder opal 3.35 ct oval cabochon on a black background showing bright blue green fire with rainbow flashes.

This 3.35ct natural crystal boulder opal from Queensland glows with a vibrant kaleidoscope of rainbow colors. Its large oval shape features intense flashes of electric green, aqua, and fire orange, dancing vividly across a transparent, polished surface. The elongated silhouette makes it ideal for a luxurious pendant or bespoke centerpiece for a high-end jewelry piece.

Features & Benefits:
100% Natural Solid Crystal Opal Ethically sourced from Queensland, Australia
Vivid Rainbow Play-of-Color Bright greens, blue , oranges, and yellow
Elegant Oval Cut Balanced proportions perfect for statement jewelry
Transparent Body Enhances brilliance and depth
Smooth Polished Surface Ideal for bezel or prong settings
October Birthstone A meaningful and luxurious gift
Australian Treasure Rare and collectible gem quality

Read our Blogs to learn more about Opals
Watch more of our opals on YouTube

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.

Add to Wishlist

3.35ct Natural Crystal Boulder Opal

AU$1,909

In stock

Details

Dimension:

16.5x10.5x3 mm

Weight:

3.35 ct

Type:

Natural Solid Untreated Crystalย Boulderย Opal

Source:

Winton, QLD, Australia

Sku:

XX1500

This 3.35ct natural crystal boulder opal from Queensland glows with a vibrant kaleidoscope of rainbow colors. Its large oval shape features intense flashes of electric green, aqua, and fire orange, dancing vividly across a transparent, polished surface. The elongated silhouette makes it ideal for a luxurious pendant or bespoke centerpiece for a high-end jewelry piece.

Features & Benefits:
100% Natural Solid Crystal Opal Ethically sourced from Queensland, Australia
Vivid Rainbow Play-of-Color Bright greens, blue , oranges, and yellow
Elegant Oval Cut Balanced proportions perfect for statement jewelry
Transparent Body Enhances brilliance and depth
Smooth Polished Surface Ideal for bezel or prong settings
October Birthstone A meaningful and luxurious gift
Australian Treasure Rare and collectible gem quality

Read our Blogs to learn more about Opals
Watch more of our opals on YouTube

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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