Opal with dendrite

Avoid heavy manual labor, moving furniture, sports, gardening, or any other vigorous activity in which your opal may interact with hard surfaces, and your decoration will last a long life.
Be careful with very hot light sources, as excessive heat can cause opals to expand and crack. For the same reason it is dangerous to leave opal for a long time in direct sunlight.

Negative temperatures are also dangerous, as the expanding water from the composition of this mineraloid can contribute to the cracking of the stone during freezing.
Do not expose the opal to extreme fluctuations in heat (for example, the location of the opal over the flame). Extreme heat fluctuations cause the opal to expand and contract, causing cracking.

Extremely low humidity for a long time is also undesirable.

It is important to note that opals should never be cleaned in an ultrasonic cleaner, as extreme vibrations can also