Answer:
I am what one cannot keep, two cannot hold, and three cannot destroy. What am I?
Iβm white; perfect for cutting & grinding. For most animals I am a useful tool.
You throw me out when you want to use me, but take me in when you donβt want to use me. What am I?
What insect does a blacksmith manufacture?
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.