Answer:
Geodes
they are natural rocks with crystal formations naturally occuring inside.
you wont know what the crystals inside look like until you open it yourself, hence getting more people to buy due to its surprise factor.
I am guessing on this, but I think that the answer is the body.
Answer:
which poem????????????????
an act of speaking one's thoughts aloud when by oneself or regardless of any hearers, especially by a character in a play