mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to greasy luster, translucent to transparent, conchoidal fracture, hexagonal crystal system, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to greasy luster, translucent to transparent, conchoidal fracture, hexagonal crystal system, specific gravity of 2.65.
Formation & geological history
Formed in hydrothermal veins, pegmatites, and sedimentary environments. The reddish-brown band is caused by iron oxide (limonite or hematite) staining.
Uses & applications
Used in electronics, optics, manufacturing of glass and ceramics, gemstone carvings, and as a popular mineral for rock and crystal collectors.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass), lack of cleavage, and glassy appearance. Found globally in almost all geological environments.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary