The Small Rock

The Small Rock is an unlockable passive item.

Effects

 * +1 damage.
 * -0.2 speed ( not applied until the next time Isaac's speed stat is updated).
 * +0.2 tears ( not applied until the next time Isaac's tears stat is updated).

Trivia

 * 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,, and  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.

Seeds
3V10 RC7Y (Tinted Rock in the room above spawn) B1VF CM3S (Tinted Rock in the room below spawn) X830 RRFL (Tinted Rock in the room below spawn) F4GJ 7ZHK (Tinted Rock in the room before the boss room) SFE6 QGF9 (Tinted Rock in the room left of spawn) MSKX 1XN8 (Tinted Rock in the room left of spawn) T8GC DE46 (Tinted Rock in the room right of spawn)