Aventurine is green and it’s a quartz, but it’s not called green quartz.  True green quartz does not have the inclusions and shine of aventurine, plus it’s fairly rare.
Aventurine is an eye-catching crystal that is adored by many for its magnificent shimmery appearance. The presence of the mineral Fuchsite lends Aventurine its unique green tone that is highly rare amongst quartz varieties. 
 
Aventurine is green and it’s a quartz, but it’s not called green quartz.  True green quartz does not have the inclusions and shine of aventurine, plus it’s fairly rare.
 
              Aventurine, or aventurine quartz, belongs to the same crystal family as amethyst, blue quartz, green quartz, and citrine.  What sets it apart from its relatives, is the presence of small internal flakes of mica or hematite that reflect light, causing it to shimmer or glisten.  This effect is called aventurescence.