Board Thread:Questions and Answers/@comment-11626545-20160305051500/@comment-679780-20160305203548

I think only Sonic Battle ever had the concept of a broken Chaos Emerald.

Dr. Eggman somehow broke the Chaos Emeralds into five pieces and put a piece each into E-121 Phi robots. Though I find how canon the game is rather ambiguous.

Personally, I imagine smasking a Chaos Emerald will be like setting off an atomic explosion. But if it's okay to smash the Master Emerald at times then I guess Chaos Emeralds are safe to break.