'What is to give light, must endure burning'

when I stepped there in my shoe
a jewel pressed on my heel,
what was a rock unburdened in light
as there was fire,
in the light it held its shape
though it did shimmer
as it fell,
from the tapping of the sole,
from the lip,
with my hand,
to the floor, and bouncing,
left no trace in the darkness
below.