Answer:
What common English verb becomes its own past tense by rearranging its letters?
What is often returned, but never borrowed/
Of no use to one, Bliss to two. Men lie for it. The babyβs right,
What turns from red to black as soon as it touches water?
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?