Makes sense that she's unaffected, because she's already a rock

Samdaman said in comment #2602583:

Makes sense that she's unaffected, because she's already a rock

So then why is the pebble affected?

Blank_User said in comment #2602585:

So then why is the pebble affected?

Uhh because the pebble is made of the same minerals that's in the lake?

IDFK

Blank_User said in comment #2602585:

So then why is the pebble affected?

Pebble weak. Biboo strong!