Why Your Opal Went Cloudy in the Shower

Have you noticed your opal jewellery turning cloudy or milky after a shower or swim? If so, you’re not alone—and the reason likely comes down to the type of opal you own.

Many cloudy opals are Ethiopian Welo opals. These stones are “hydrophane,” meaning they are naturally porous and quickly absorb water. When water enters the microscopic pores, it disrupts the way light moves through the opal, causing it to lose its signature play of colour and become cloudy, milky, or even transparent. Sometimes, the opal dries out and returns to normal, but repeated or prolonged exposure can cause permanent dullness or cracking.

Solid Australian opals—like those from Lightning Ridge, Coober Pedy, and Queensland—are non-porous. They do not absorb water, so they won’t turn cloudy or lose their colour from getting wet. This makes them a far better choice for everyday jewellery, especially for anyone who doesn’t want to worry about accidental water exposure.

Even with Australian opals, doublets and triplets (thin opal slices layered with backing or a clear cap) can be damaged if water seeps between the layers. That’s why we always recommend solid opals for the best durability and peace of mind.

At Iona Opal Australia, we specialise exclusively in solid Australian opals. They’re not only more beautiful and valuable, but they’re also practical for daily wear. You don’t have to worry about cloudiness, water absorption, or unexpected surprises—just enjoy your opal’s natural brilliance every day.