Half Moon Natural Boulder Opal: A 11.3 ct Gem of Timeless Beauty
The Half Moon Natural Boulder Opal is a breathtaking gemstone that showcases the wonders of nature through its unique shape and captivating play-of-color. Weighing an impressive 11.3 carats, this opal, sourced from the renowned Winton opal fields in Queensland, Australia, is a true testament to the Earth’s ability to create unparalleled beauty. The opal’s exquisite half-moon shape, natural solid composition, and vibrant flashes of color make it a prized possession for collectors and jewelry designers alike.
Exceptional Natural Beauty
The Half Moon Natural Boulder Opal is completely natural, solid, untreated, and polished, ensuring that its stunning appearance is entirely authentic and unaltered. Unlike synthetic or treated opals, this gemstone retains its original charm and inherent value, making it a coveted addition to any gemstone collection.
This opal features a unique half-moon shape, which enhances its visual appeal and offers versatile design possibilities for jewelry enthusiasts. The stone exhibits a delicate interplay of soft blues, vibrant greens, and hints of iridescent flashes, which shift beautifully under different lighting conditions. This enchanting color display is a hallmark of high-quality boulder opals, making the Half Moon Natural Boulder Opal a true standout piece.
Unique Shape and Design Potential
The half-moon shape of this opal adds an artistic and contemporary touch to traditional jewelry designs. Its curved silhouette and organic aesthetic make it an excellent focal point for custom-made jewelry, allowing designers to create one-of-a-kind pieces that reflect individuality and elegance.
Jewelry crafted from the Half Moon Natural Boulder Opal can take inspiration from celestial motifs, minimalist modern designs, or classic vintage styles. Whether set in yellow gold, white gold, or sterling silver, this opal’s soft yet vibrant color palette complements a wide range of metal choices.
Shipping Updates - March 2026
Latest international delivery information from Australia Post and FedEx.
USA Tariff
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 our Shipping Policy page for more information.
7 day return and refund policy.
Please view our Return and Refund 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.
Half Moon Natural Boulder Opal 11.3 ct
AU$559
In stock
Details
|
Dimension: |
25x12x5 mm |
|
Weight: |
11.3 ct |
|
Type: |
Natural Solid Untreated Boulder Opal |
|
Source: |
Winton, QLD, Australia |
|
Sku: |
XX1075 |
You may also like
Recently Viewed
Reviews
Susanna
helena
Lewis
Hakuna
sean pedersen
Wendy
Ashley
Charles
Stefan Delblanc
Christy
cookiemonster909
raj
Bruce
Bob
Julia Schwind
brent
Cornelia
Sharie
Caitlin
Deborah
Rachael Rocha
Brett
holbrookandtom
Lynton
Brent
Jaye
brent
Thomas L.
Irene
Richard
Sandy
Beverly S.
Cornelia
Quiao