Answer:
What can go through glass without breaking it?
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
I can be cracked, I can be made. I can be told, I can be played.
A great mysterious place that the bold have been known to journey into.
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love or tear it down. I can make a smile or bring a frown.
What age most travelers have?