I am worn in red where a bride should wear white. I bloom for the living, yet cling to the dead. In the Lowlands Away, I rest on her breast the only color left when the song tells her fate. Love placed me there; loss made me stay. What am I?

In vaults of blackness dost thou find me, where Prometheus dared to steal. I dance with shadows, a flick'ring sprite, consuming all with warmth and zeal.

A sea of red, when all is dead, From broken ground I rise. A cure for pain, a sweet sedative strain, Or cloud your mind and blur your eyes.

I used to be one, but aeons wore me down, From what i am now, time's passage was drawn. Cast me in flame, unite me true, and once i am pure, you will see through.

Columbus travelled the seas with me, Harry's parents filled his vault with me. Lose one letter and you can measure fluids with me.