Also known as: Green Quartzite, Adventurine, Adventurine Quartz Formula: SiO?
Hardness: 6.5-7
Color: Green, orange, yellow
Aventurine is a variety of quartz that contains mica fragments that sparkle and give color in the light, making them attractive as gemstones or beads for jewelry. It is often mistaken for jade because of its most common green color. Faberge used aventurine in creating some of his famous decorative eggs.