Navo's riddles

in marble walls as white as milk,
lined with skin as soft as silk,
within a fountain crystal clear
a golden apple does appear
no doors are there to this stronghold,
yet thieves break in and steal the gold.

What is it?

I met with a silver dragon who asked me that.

it is an Egg

Brad stared through the dirty soot-smeared window on the 22nd floor of the office tower. Overcome with depression he slid the window open and jumped through it. It was a sheer drop outside the building to the ground. Miraculously after he landed he was completely unhurt. Since there was nothing to cushion his fall or slow his descent, how could he have survived the fall?

he jumped from the outside in

ok hears a hard one:

I come in different shapes and sizes. Part of me are curves, others are straight. You can put me anywhere you like, but there is only one right place for me.
What am I?

you are a jigsaw puzzle peace