Aventurine Crystal - Size approximately. 15mm - 25mm. 
Aventurine is a form of Quartz. 
 
Aventurine is a stone of prosperity.  It reinforces leadership qualities and decisiveness.  Promotes compassion and empathy.  Encourages perseverance.  Aventurine relieves stammers and severe neuroses.  It stabilises one’s state of mind, stimulates perception and enhances creativity.  Aids in seeing alternatives and possibilities.  Calms anger and irritation.  Promotes feelings of well-being.  Aventurine balances male-female energy.  It encourages the regeneration of the heart.  Protects against environmental pollution.
 
Green Aventurine. 
Chakras - Heart Chakra. 
Green Aventurine is a comforter and heart healer.  It neutralises all sources of electromagnetic pollution, blocking out emanations from computers, television and other electronic equipment.  Green Aventurine settles nausea and dissolves negative emotions and thoughts.  It brings well-being and emotional calm.  A good all-round healer.