The care of Opal
The second is the situation where an opal has been left in a jewelry
box for several years and is cracked when it is taken out. Again, it may be that the opal was hit by other jewelry over the years. But it may be not the cause. Here, again my recommendation that you wear and love your opal. The moisture the stone get when it is worn may prevent any problems. Alternativly, you could soak it in water periodically . It will not hurt and might help. (Do not , however, soak it if the opal is a doublet or triplet).