A silicon dioxide with a hardness of 7 and a hexagonal structure. They can have inclusions of other minerals. It is the most abundant mineral found at the Earth’s surface. Most are between 100 to 125 Million years old.
A silicon dioxide with a hardness of 7 and a hexagonal structure. They can have inclusions of other minerals. It is the most abundant mineral found at the Earth’s surface. Most are between 100 to 125 Million years old.