Pebbles are like baby Rocksters.
If you attack or try to tame a Pebble, a nearby Rockster will attack you if the Pebble calls out, or more Pebbles will come and fight alongside with the initial Pebble also attacking you. Pebbles are pretty fast too.
To kill a Pebble, strike them 10 times with a Twig, 5 times with a Wood Sword, 4 times with a Stone Sword, 2 times with an Obsidian Sword or Iron Sword, or 1 time with a Diamond Sword or Lumite Sword.
Pebbles, when killed or dimissed, can drop
- Pebble's Pebble
- and, like many other creatures, also Bones, Sinews and/or
- Globs of Goo
You can harvest from your pets pretty much the same materials that you'd get as a loot. Before R25 you could rarely also get Magnetite from them.