Answer:
I am an instrument that you can hear but cannot see or touch. What am I?
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
What has a thumb and four fingers but is not alive?
I have thirteen hearts but no body or soul. What am I?
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.