How do I care for antique opal jewellery?

Opals contain water within their structure and possess a lower relative hardness than diamonds. Avoid exposing them to harsh chemicals, ultrasonic cleaners, and sudden temperature fluctuations. Store them separately in a fabric-lined box to prevent scratching from harder gems. Gentle cleaning with a soft, damp cloth preserves the surface polish without damaging the mount.

What is the difference between solid opal and boulder opal?

Solid opals consist entirely of precious opal material, whether cut from white opal crystal or black opal rough. They display colour across the body of the stone without underlying rock. Boulder opals remain embedded in the natural ironstone host rock where they formed. The remaining ironstone backing provides natural reinforcement and deep contrast for the opal layer.

Can a brooch be worn as a pendant?

Many Victorian and Edwardian pieces were fabricated as convertible brooch-pendants. These items feature a secure pin mechanism alongside a hidden or fold-down loop for a chain. This dual functionality allowed wearers to adapt the ornament to different garments. Checking the reverse side reveals the hinge, pin, and suspension loop arrangement.