Read the poem by Emily Dickinson. THE LOST JEWEL

I held a jewel in my fingers
And went to sleep.
The day was warm, and winds were prosy;
I said: "'Twill keep."

I woke and chid my honest fingers, --
The gem was gone;
And now an amethyst remembrance
Is all I own.

Which best describes the ambiguity in this poem?

Is the jewel literal or figurative?
Where did the gem go?
Why did she go to sleep?
Is memory all any of us own?