Quartz
Physical Properties
| Color | Colorless, white, milky |
| Form/Habit | Prismatic or massive. Common crystals are six sided prisms terminated by rhombohedrons, which may appear to be six sided hexagonal dipyramids. |
| Lusture | Vitreous |
| Streak | White (indeterminable) |
| Hardness | 7 |
| Cleavage | Absent |
| Fracture | Conchoidal |
| Specific Gravity | 2.65 |
| Chemical Composition | SiO2 |
| Crystal System | Hexagonal (rhombohedral) |
| Diagnostic Properties | Hardness of 7, absence of cleavage, conchoidal fractures, prismatic habit |
Associations
Quartz is a common and essential mineral in many igneous, sedimentary and metamorphic rocks. It occurs in all silicic metamorphic and igneous rocks.
Gallery
