Two Turtles

Reader, these two turtles are one described:
Their shells coloured my sight prescribed,
Whose eyes commanded hands extend,
Fit for fingers touch upon shells to tend,
Though warm and hard was one such shell,
Drew back the other knocked as a bell,
Like a drop echoing erst the ripples form,
Each sound crawls ere a hundred born;
Now cast I check a shell: empty and cold!
Sunk, sunk away! yet its soul be gold!
Like new burberry, I tried and I wait,
This time, the price tag was no bait!
Whence my legs stretched, my neck curled,
Did slip through and here am pearled!
Child I was, such a shell then broken song!
Yet this child in me never truly gone!
Oh, beautiful shell! How bright your smile,
How blessed to have grown back in style!
Slow are the days ahead by mud be test, 
Yet rain sings "trip to tread tight" in jest!
Swim, swim away! Pieces of my past, swim!
Float and hence such erupting sorrow!
This shell abandoned new, is but shell adorned!