Will amber ice crack?

It will crack. Ice crack is a defect of amber, because amber has a patina and a shell on its surface. After years of storage, dehydration has occurred inside, forming tiny fragments.

The reason of amber ice crack is that the iron contained in blood amber reacts with oxygen for a long time and forms a network texture. The cracking of amber ice cracks can be avoided by avoiding direct sunlight, staying away from dry environment and avoiding collision with hard objects.