South Australia Opal | 1.78ct, Cabochon, Freeform, Blue, Teal, Green

• Opal is one of Australia’s most distinctive gemstones, loved for its play-of-colour, individuality and connection to the Australian landscape.
• Every opal is different. Pattern, brightness, body tone, transparency and colour movement can vary dramatically from stone to stone.
• Australian opals, including stones from South Australian fields such as Coober Pedy, are especially meaningful for clients who value local provenance.
• With a Mohs hardness of around 5.5–6.5, opal is best suited to jewellery that is worn thoughtfully, with protective design and realistic care expectations.
• We assess opals individually for colour, pattern, stability, cut, origin and setting suitability so the finished piece respects the nature of the stone.

Is opal suitable for an engagement ring?

Opal can be used in an engagement ring, but it is not a low-maintenance choice. It is softer and more sensitive than sapphire, ruby or diamond, so it needs protective design, careful wear and realistic expectations. We usually recommend opal for clients who understand its character and are prepared to care for it.

What makes Australian opal special?

Australia is one of the world’s most important opal sources, and Australian opal has a strong connection to place. Stones from regions such as Coober Pedy can show beautiful flashes of colour and a distinctly Australian story.

How should opal jewellery be cared for?

Opal jewellery should be protected from knocks, harsh chemicals, ultrasonic cleaners, steam cleaners and sudden temperature changes. Clean gently with a soft cloth or mild soapy water, and have the setting checked periodically.

Are opals treated?

Some opals are untreated, while others may be assembled or treated depending on type and source. We disclose treatment information where it is available, including when an opal is listed as having no treatment.

Opal sourcing is about individuality, stability and provenance. Unlike many faceted gemstones, opal is valued for its play-of-colour, pattern, brightness and natural character.

Our opal selection focuses on Australian opals, including South Australian stones such as Coober Pedy opal. These gemstones offer a direct connection to Australia’s gem history and landscape.

Where treatment information is available, we disclose it. Untreated Australian opals can be especially appealing when they show strong colour play, pleasing pattern and stable material.

For custom jewellery, we choose opals with both beauty and practicality in mind. The right opal should suit the design, setting style and intended wear, not just look beautiful on its own.