Binding of Isaac: Rebirth Wiki

The Small Rock is an unlockable passive item.


  • +1 damage.
  • -0.2 speed (Removed in Afterbirth † not applied until the next time Isaac's speed stat is updated).
    • Removed in Repentance -0.2 maximum speed.
  • +0.2 tears (Removed in Afterbirth † not applied until the next time Isaac's tears stat is updated).


  • Has a small chance to be dropped from a destroyed tinted rock.
    • Added in Repentance The first encountered Super Special Rock is guaranteed to spawn The Small Rock if it wasn't seen before.
  • Normally only appears once per run, but can appear again if Isaac's items are re-rolled with D4 D4, D100 D100, or a Dice Room Dice Room.
  • Removed in Repentance Always has a chance to spawn as long as Isaac does not currently have it. This includes the possibility of spawning and obtaining multiple copies of The Small Rock on the same floor if not picked up the first time.
  • Taking the rock in the Boss Rush Boss Rush from a tinted rock in the room will count as taking an item and consequently trigger Boss Rush. The other items do not disappear and will stay until one is picked up.


  • Added in AfterbirthDiplopia Diplopia/Added in Afterbirth †Crooked Penny Crooked Penny: Additional copies grant an additional tears up and speed down with no further increase in damage.

In-game Footage[]


  • In the original Binding of Isaac, the player's tears would take on a grey color after Small Rock has been picked up. In Rebirth, however, the tears will be red.
    • However, before the Halloween Update, the player’s tears were blood tears. The reasoning for the change from blood to grey is unknown.
  • This item is used in Head Trauma (challenge #3).
    • Head Trauma is unlocked by default, despite the fact that Small Rock isn't. This item, Added in RepentanceTMTRAINER TMTRAINER, Added in RepentanceDirty Mind Dirty Mind and Added in RepentanceSpirit Sword Spirit Sword are the only items that appear in challenges before they are unlocked. Small Rock and TMTRAINER are also notable for not being unlocked by beating the challenge they appear in.


PC Removed in Repentance Hard mode only 3V10 RC7Y (Tinted Rock in the room above spawn)

PC Added in Repentance Normal mode only B1VF CM3S (Tinted Rock in the room below spawn)

Vita X830 RRFL (Tinted Rock in the room below spawn)

3DS Normal mode only F4GJ 7ZHK (Tinted Rock in the room before the boss room)

WiiU SFE6 QGF9 (Tinted Rock in the room left of spawn)

Switch Hard mode only MSKX 1XN8 (Tinted Rock in the room left of spawn)

Switch Hard mode only T8GC DE46 (Tinted Rock in the room right of spawn)