Green Aventurine Measures Approx.: 1 1/2 x 1" W Comes with Color Healing Property Card. Aventurine Stones Aventurine: According to believers in the power of stones and crystals, Aventurine’s strongest mental healing characteristic is its ability to ground an individual emotionally, thus allowing for thought that is free of fear, troubled emotions, indecisiveness, and anxiety. Below you can super size your Aventurine to XXTRA Large stone for an additional $3.00 nice size: Approx: 1 3/4 x 1 1/2+ You will receive one stone with a Color Healing Properties card. Great Kit!