Answer:
I'm the source of all emotion, but I'm caged in a white prison.
As beautiful as the setting sun, as delicate as the morning dew. An angel's dusting from the stars. That can turn the Earth into a frosted moon.
What has three feet but no arms or legs?
I wear a red robe, with staff in hand, and a stone in my throat.
A seed am I, three letters make my name. Take away two and I still sound the same.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.