mineral

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glass-like)

Identified March 14, 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 Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); 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 or veins. This specimen shows a druzy or clustered growth pattern, found in environments ranging from igneous pegmatites to sedimentary geodes.

Uses & applications

Used widely in electronics (piezoelectric properties), glassmaking, abrasives, and as semi-precious gemstones in jewelry and metaphysical collections.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. Ancient Greeks believed clear quartz was deeply frozen ice that would never melt, hence the name 'krystallos'.

Field identification & locations

Identify in the field by its six-sided prismatic crystals ending in a pyramid, its inability to be scratched by a steel knife, and its glassy luster. Commonly found in 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