How to Care for your Boulder Opal Jewellery

What Makes Boulder Opal Different

Boulder opal is mined in Queensland, Australia, and forms in the natural ironstone host rock. Unlike white or crystal opal, the ironstone backing is left intact — it's part of the stone, not a flaw. This seam of ironstone gives boulder opal its characteristic depth and makes it naturally more durable than other opal types. That said, the opal layer itself still benefits from a little care.

Cleaning Your Boulder Opal Jewellery

The safest way to clean boulder opal jewellery is with warm (not hot) water and a very small amount of mild, fragrance-free washing-up liquid. Use a soft cloth or a very soft toothbrush to gently work around the setting, then rinse with clean water and pat dry with a lint-free cloth. Allow the piece to air dry fully before storing.

Avoid:

• Ultrasonic and steam cleaners — vibration and heat can stress the opal layer
• Harsh detergents, bleach, or ammonia-based cleaners
• Abrasive cloths or polishing compounds designed for metal — these can scratch the opal surface
• Soaking the piece for extended periods

Water Exposure

Brief contact with water during handwashing is generally fine for a well-set boulder opal piece, but prolonged soaking is best avoided. Remove your opal jewellery before swimming — both chlorinated pools and saltwater can dull the surface or affect the metal setting over time. A quick rinse after accidental contact is perfectly fine; just dry the piece promptly.

When to Take Your Jewellery Off

Developing a simple habit of removing your opal pieces before certain activities goes a long way:

• Household cleaning — detergents and cleaning sprays can dull the finish of both the opal and the metal setting
• Gardening — soil and grit can scratch, and a sharp knock against a trowel or stone can chip an exposed opal edge
• Exercise and sport — impact and heavy perspiration are worth avoiding
• Applying lotions, perfume, or hairspray — apply these first and allow them to dry before putting your jewellery on

A small dish or ring holder near the sink makes this easy to remember.

Settings and Protection

The way your opal is set makes a real difference to how well it's protected day to day. A bezel setting — where a band of metal wraps around the edge of the stone — shields the opal from knocks and catches far more effectively than a claw or prong setting, which leaves the edges more exposed. If you're choosing a piece you plan to wear frequently, it's worth considering the setting style alongside the stone itself.

Our Double Boulder Opal Necklace in purple and cornflower blue and our Large Boulder Opal Necklace in mixed metals both showcase boulder opal set with care for everyday wearability.

Storing Your Opal Jewellery

Store boulder opal pieces individually — either in a soft pouch or a lined jewellery box compartment — so they can't rub against other pieces or harder gemstones. Keep jewellery away from direct sunlight and extreme heat, such as a windowsill in summer or near a radiator. Very dry conditions over a long period can occasionally affect some opal types; a drawer or jewellery box away from heat sources is ideal.

Explore Our Boulder Opal Collection

If you're looking for a new piece to love, browse our full Necklace collection — including one-of-a-kind boulder opal necklaces, pendants, and more. Every stone is unique, and no two pieces are ever quite the same.