Answer:
I can go through glass without breaking it.
Iām white; perfect for cutting & grinding. For most animals I am a useful tool.
I have to be broken before I can be used
I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?
If you drop me I'm sure to crack but give me a smile and I'll always smile back. What am I?
When is it bad luck to see a black cat?