Watch in a ring

Found mum's old watch today
A watch in a ring; unusual I say
Never seen another like it
Just a little worthless trinket
Maybe; but mum used to love it
Today I am wearing it...
She wore it for many years
Remembering brings on the tears
Ah mum I miss you so very much
Here I am with your treasures
Nothing very valuable as such
But by what yardstick are such things measured?
You lived simply; loved with all your heart
Took care of your precious family
Made taking care of all of us
Your amazing, beautiful art...