13/10/2026
Opal is quite different from many other gemstones because it contains water within its structure.
Very dry conditions, strong heat and sudden temperature changes can contribute to fine fractures known as crazing.
It is particularly useful to know at this time of year, as temperatures drop and indoor heating starts going back on.
For cleaning, warm soapy water is the safest option. Steam and ultrasonic cleaners should be avoided.