Green Quartzite

Physical Properties

Hardness: 7 (Mohs scale); Color: Pale green to sage with white or tan banding; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.6 - 2.7

Formation & Geological History

Formed through the metamorphism of quartz-rich sandstone under high heat and pressure. The green color is often caused by the inclusion of minerals like fuchsite (a green mica) or chlorite.

Uses & Applications

Used as an ornamental stone, for decorative gravel, in lapidary work for cabochons/beads, and in building stone for countertops and wall cladding.

Geological Facts

Quartzite is so hard that it will scratch glass and steel. It is more durable and resistant to chemical weathering than the sandstone from which it originated.

Field Identification & Locations

Identify in the field by its grainy, sandpaper-like texture that resists being scratched by a knife. Look for it in folded mountain belts. It mimics marble but is much harder and will not fizz with acid.

Identified on: 4/15/2026

Mode: Standard