Do not put your opal in an ultrasonic cleaner
Do not submerge your opal in water
Do not use detergent on your opal
Do not use any chemical on your opal (including jewelry cleaner)
Opal gems and jewelry should be stored in a place where they aren’t exposed to high temperatures or low humidity in order to avoid dehydration and crazing. Place them in a padded cloth bag to avoid being scratched by other jewelry. For longer storage periods, place your opal in cotton wool with a few drops of water.