mineral

Clear Quartz (Druzy/Crystal Cluster)

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale. Color: Colorless to white/transparent. Luster: Vitreous (glassy). Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Colorless to white/transparent
Luster: Vitreous (glassy)

Identified March 20, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7 on the Mohs scale. Color: Colorless to white/transparent. Luster: Vitreous (glassy). Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Formation & geological history

Formed from silica-rich hydrothermal solutions cooling in rock cavities (geodes or veins) or as late-stage crystallizations in igneous pegmatites. It can be found in rocks from nearly any geological age.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, abrasives, and as a gemstone for jewelry, carvings, and metaphysical/collecting purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress, which is why it is used in watches.

Field identification & locations

Identify in the field by its hardness (will scratch glass and steel), lack of cleavage, and characteristic six-sided crystals. Common worldwide; notable deposits include Brazil, Arkansas (USA), and Madagascar.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral