The LEBRON Rock is a blue orb that is as small as a pebble. It can't be thrown because it's so hollow that if it falls it would crack in two instantly. It's a very bright blue colour and it has little dark blue spots all around it.
The LEBRON Rock is formed by melting hippopotamus poop. The poop has to be put in lava then taken back out at exactly the right time. Once you have taken the poop out you then need to remove the cooled magma from its sides and.... BOOM ITS NOW A LEBRON ROCK. Just polish it up and there's your final product.