Mineral - Aventurine

Name Aventurine
Class Semi-precious
Category Quartz
Crystal system Rhombohedral
Chemical composition Silicon dioxide (SiO₂) with inclusions of fuchsite, hematite, or mica
Hardness (Mohs scale) 6.5 to 7
Transparency Translucent to opaque
Geographical origin India, Brazil, Russia, China, United States, Tanzania