Answer:
Iām hard as a rock and as light as a feather. Iām passed on to one another. Poor people need me and rich people have me.
I have a brother. However much we run we do not reach each other.
What is so delicate that saying its name breaks it?
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
I am a shower that lights up the sky
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.