A good leader, despite the stones in his heart, must always behave confidently.
For her, the theft of that beautiful necklace was like stones in her heart.
Dripping water pierces a stone. (That is, persistent effort can accomplish unexpected and amazing things.)
A mantis appeared from behind a rock.
I shape a rock to look like an ikran.
Rini tried to escape but her foot got caught under a rock.
I throw a stone to/towards you.
(Ne does indeed imply the physical act of throwing towards someone, keeping with the idea that verbs of motion use ne as the place towards which the motion is directed.)
I throw a stone to you
(The dative case would be used in the sense of giving the stone to someone, although there's some overlap here with ne.)
I throw a stone at you.
(And wä would have an aggressive connotation.)
The path ahead of them was full of rocks and irregular.
This rock has straight sides; it's not rounded.
The rocks in that pile are very heavy.
One person alone can't lift that heavy rock.
A: How do you spell the word tskxe?
B: It's spelled ts, kx, e.'
The aliens destroy our sacred place to dig up dead rock.