This 19.85ct natural Australian black opal was mined in Lightning Ridge New South Wales Australia. Cut into a massive oval cabochon, this solid loose gemstone features intense electric blue and vivid teal fire across a dark base. A rare collector grade stone suited for an exclusive statement pendant or high jewelry design.
Jewelry Making with Black Opal 19.85ct
Measuring over 26 mm in length with a deep profile, this statement gemstone is primed for a master jeweler to create an exclusive luxury pendant or high jewelry showpiece. The flat back provides an ideal surface for setting securely in platinum, white gold, or yellow gold bezel mountings.
October Birthstone
Opal is the traditional October birthstone. This natural Australian black opal works well for an October birthday gift or custom jewelry project.
Authenticity
100% natural solid Australian black opal. No treatments. No doublets or triplets. Not smoked Ethiopian opal.
Certificate available upon request. Authentic & Trusted Opal Certification by Opal Galaxy
Learn more
Lightning Ridge Black Opal Complete Guide | What Makes an Opal Valuable| Australian Opal Buying Guide | Which Star Signs Should Wear Opal?
Browse all black opals collection or contact us with questions.
Shipping Updates - March 2026
Latest international delivery information from Australia Post and FedEx.
USA TariffÂ
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 $5000
Extra Cost $25 EMS Shipping Upgrade under $200
Extra Cost $10 EMS Shipping Upgrade under $999
Extra Cost $100 FedEx Shipping Upgrade under $4999
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.
Australian Black Opal Oval Lightning Ridge 19.85ct
AU$10,986
In stock
Details
|
Dimension: |
26.5 mm x 19.7 mm x 6.4 mm |
|
Weight: |
19.85ct |
|
Type: |
Natural Solid Untreated Black Opal |
|
Source: |
Mulga Field, Lightning Ridge Australia |
|
Sku: |
XX2011 |
|
Notes Substantial 19.85 carat size with massive visual presence |
|
| Deep dark body tone with brilliant electric blue and teal fire | |
| Smooth high dome oval shape ideal for luxury statement pendants | |
| Completely natural gemstone with zero chemical or heat treatments | |
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