Answer:
A king wears one on his head.
A tiny bead, like fragile glass, strung along a cord of grass.
It's in your hand though you cannot feel it. Only you and time can reveal it.
What is always on its way but never arrives?
A house where you are brought, If they find you or get caught. If you cross the government, This is where you will be sent.
I am a rock group with four members. All dead one was assassinated.