However, you should avoid immersing opal doublets and triplets in water, as the glue holding the layers together could be dissolved. A bit of rain won't hurt, but it is best to remove a doublet or triplet ring before putting your hands into sudsy dishwater.
If you wear your opals daily, they could lose some of their polish over a long period of time. In just a few minutes an experienced jeweller can simply re-polish the surface to bring back your opal's original brilliance and shine. Solid opal jewellery (but not doublets/triplets) can also be cleaned in a jeweller's ultrasonic cleaner."