Answer:
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
Lovely and round I shine with pale light grown in the darkness a lady's delight.
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
I have four fingers and a thumb, but I'm not living. What am I?
I am black of eye and bright of hair. I fast into the ground and follow my lord as he races around the world. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.