100% Solid Australian Opals • Carefully Selected & Finished in Australia • Direct from our Family Business — No Retail Markup • Worldwide Delivery
11.3ct Andamooka Matrix Opal Pendant Necklace ~ 'Coorong Nightfall' | 925 Sterling Silver | Solid Australian Opal
Free shipping within Australia and flat rate international delivery.
Sourced from Australia’s best opal fields. Carefully selected, cut and finished by our family in Queensland.
⭐ Trusted by opal lovers worldwide with a 4.9 star rating
Immerse yourself in the beauty of Australia with this hand-cut solid 11.3ct Andamooka Treated Matrix Opal 925 Sterling Silver Pendant.
Please Note: This is a treated Matrix Opal.
What Is Sugar Treatment and Why Is It Used?
Matrix opal, like this piece, features opal interspersed within its host rock. To bring out its captivating colours, the opal undergoes a sugar treatment—a process where the stone is soaked in a sugar solution, then heated in acid to darken the matrix. This enhances the opal's natural brilliance, creating a stunning contrast that showcases its radiant hues. The result is a breathtaking gem that’s as unique as the landscape it hails from. Sugar treating is only done on Matrix opal.
Why Choose Andamooka Treated Matrix Opal?
At Iona Opal Australia, we are committed to authenticity and ethical practices. The only treated opal we sell is Andamooka Matrix Opal, ensuring our customers enjoy genuine, sustainably sourced gemstones of the highest quality. Each piece is a testament to the skill and tradition of enhancing nature's beauty while respecting its origins.
Our Coober Pedy Opals, Lightning Ridge Opals and Queensland Boulder Opals are treatment free.
This pendant features an 11.3ct opal measuring 21mm x 13mm x 7mm. It shows bright blues and greens. The setting is 925 sterling silver. The opal is matrix opal from Andamooka, South Australia, which is traditionally sugar treated to bring out its colour.
Opal Weight 11.3ct
Opal Dimensions 21mm x 13mm x 7mm (approx.)
Origin Andamooka, South Australia
Brightness B3 - Bright
Body Tone
Shape Oval
Colours
Metal Type 925 Sterling Silver
Chain Type Silver Display Chain 45cm
Earring Type N/A
✔ Solid Australian opal (no doublets or triplets)
✔ Hand-cut and set in Australia
✔ Certificate of Authenticity provided
✔ Fully insured shipping
✔ One of a kind
✔ Priced direct from the cutter and maker — no retail markup
This is the exact piece you’ll receive. Only one exists — once it’s gone, it’s gone.
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✔ Sourced from Australia’s best opal fields and carefully selected, cut and finished by our family
✔ Certified Opal Specialists · IGS Member · Opal Association of Australia
✔ Fully insured worldwide shipping
✔ Straightforward return policy
✔ Pay in instalments with Zip, Klarna & PayPal
A complimentary display chain is included with all pendants. Chain style and finish may vary, including silver-tone and gold-coated finishes.
Unless otherwise specified, all accent stones accompanying the opal are cubic zirconia.
A note about lighting: Opal needs light to show its colour. Our opals are photographed in natural sunlight, so for the best comparison, view your opal in good natural light. Its colour and appearance will naturally vary under different lighting conditions.
FINDING YOUR PERFECT FIT?
Not sure of your ring size? Visit our Size Guide to help you find your perfect fit before you buy.
You will receive the exact piece shown in these photos.
Each opal or jewellery piece is individually photographed and completely one-of-a-kind — no stock images, no substitutions.
Certificates of Authenticity
Every piece of jewellery and loose opal includes a digital Certificate of Authenticity, confirming its genuine Australian opal provenance. Your certificate is available for download from your order confirmation page following purchase.
Postage and Shipping Information
Australia: FREE Express Post. Orders generally arrive in 2–5 business days.
International: $35 AUD Standard Post. Orders generally arrive in 7–14 business days.
We ship five days a week, with most orders dispatched within one business day.
US customers: Applicable tariffs, duties and customs clearance fees are calculated and collected automatically at checkout according to current US import requirements.
UK customers: Applicable duties and fees are calculated at checkout. UK VAT is not collected by us and may be payable upon delivery.
