When people in the trade talk about opal, Australian opal is the yardstick they measure everything else against. Australia has produced the great majority of the world’s precious opal for more than a century, and its stones set the standard for quality, stability and sheer variety. After fifty years at the bench, Australian opal is still where I start most conversations. Here is what makes it the benchmark, and how to think about it.
The home of opal
Australia supplies most of the world’s gem opal, and it does so across an unusually wide range of types. That breadth is part of why it became the standard: whatever look you are after, an Australian field produces it. For the family overview, see my guide to understanding opal.
The great fields and what they give
- Lightning Ridge in New South Wales is the source of the finest black opal, the dark-bodied, vivid stones that reach the highest prices.
- Coober Pedy in South Australia is the great source of white and light opal, the classic bright stones.
- Queensland gives us boulder opal, opal in its natural ironstone, tough and dramatic.
- Andamooka and other fields add their own crystal and light material.
Why it is so prized
Beyond the range, the big practical reason is stability. Most Australian opal is sedimentary and is not porous, so it shrugs off everyday contact with water and does not crave special handling the way some other opal does. That makes it forgiving to own and a safe choice for a piece you will wear often.
Want the benchmark stone? See the opal rings in my collection, or ask me about a custom piece built around an Australian opal.
Australian versus Ethiopian opal
The other opal you will meet most often is Ethiopian, which arrived in quantity only in the last fifteen years and offers bright color at a friendly price. The headline difference is water: much Ethiopian opal is hydrophane and absorbs water, while Australian opal generally does not, so it asks for less care. I compare the two in detail in Ethiopian vs Australian opal. I work with both, and which I reach for depends on the piece.
What Australian opal is worth
There is no single figure, because Australian opal spans everything from affordable white opal to black opal at the very top of the gem world. Body tone, brightness, pattern and the amount of red all move the price, as they do across opal generally. I lay it out in how much is opal worth.
Caring for Australian opal
Even though most Australian opal is not porous, it is still a softer stone at around 5.5 to 6.5 on the Mohs scale, so the usual care applies: gentle cleaning, no ultrasonic or steamer, and off for rough work. See caring for opal jewelry.
Frequently asked questions
Is Australian opal better than Ethiopian opal? Neither is simply better. Australian opal is more stable and easier to care for; Ethiopian opal often gives more color for the money. The right choice depends on the piece and how it will be worn.
What is the most valuable Australian opal? Black opal from Lightning Ridge, especially stones with a dark body and bright red play-of-color, reaches the highest prices.
Does Australian opal need special care? Less than some opal, because most of it is not porous, but it is still soft, so treat it gently and keep it from knocks and harsh cleaning.
If you would like an Australian opal, whether a classic white, a boulder or a fine black, I would be glad to help. Browse the current opal rings, or talk to me about a custom commission.
