Answer:
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
What stays the same size no matter how much they weight?
The sharp slim blade, that cuts the wind. What is it?
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
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?