Answer:
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
I am nothing but holes tied to holes, yet am strong as iron.
Iron on a mammal. Mammal on your feet.
What has two spines and a lot of ribs, and carries much but never moves?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.