It can be round or squared, have many curves or none at all,
I love the shape it has, its something we all carry inside.
We could easily buy it anywhere, including the mall,
even a booth outside.
Its made of something related to silver, but worth much more.
The home it has is close to my heart.
I hope I never loose it, and it falls to the floor.
You could say its an accessory but, to me its more than that.
What is it?