Lavender Ioun Stone gives the wearer a bonus to armor class of -1.
This item appears in 
Baldur's Gate II:
Throne of Bhaal (2001)
This icon indicates content from the original Baldur's Gate II: Throne of Bhaal campaign.
Baldur's Gate II: Enhanced Edition – Shadows of Amn (2013)
This icon indicates content from the Shadows of Amn campaign of the Baldur's Gate II: Enhanced Edition.(ToB), it's dropped by Gromnir Il-Khan in his castle.
Description[]
| “ | The bright lavender hue of this stone dances and sparkles, as if the stone itself were alive. | ” |