mineral

Rough Quartz (Grey-Green)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Pale grey-green to translucent light green; Luster: Vitreous to greasy on fractured surfaces; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Pale grey-green to translucent light green
Luster: Vitreous to greasy on fractured surfaces

Identified March 2, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the cooling of silica-rich magma or precipitation from hydrothermal veins. Often found in pegmatites or metamorphic environments; deposits range from Precambrian to Cenozoic ages.

Uses & applications

Used widely in manufacturing glass, ceramics, and electronics (as piezoelectric material). In this rough form, it is used for lapidary work, tumbling, or as meditation stones/healing crystals.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this one, showing a slight green tint, often contain trace inclusions of chlorite or actinolite.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and its lack of cleavage (it breaks in curved 'shells' rather than flat planes). Commonly found in riverbeds, mountain ranges, and gravel pits globally.