Opals naturally contain a certain percentage of water, which contributes to their brilliance, and must be preserved. Wear your opal and don’t expose it to excessive heat.
The opals we sell are stable.
Opal’s hardness on the Mohs scale ranges from 5.5 to 6.5, a value that allows it to be used in jewelry, but has its limits in the event of impact or contact with a surface of higher hardness: avoid shocks! (for example, sand made of quartz scratches opals, as do all materials made of quartz: cement, etc.).
Washing in lukewarm water is ideal for maintaining your opal.