mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, and specific gravity of 2.65. Color varies widely from colorless (rock crystal) to white, gray, pink, purple, or yellow.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, trigonal crystal system, and specific gravity of 2.65. Color varies widely from colorless (rock crystal) to white, gray, pink, purple, or yellow.
Formation & geological history
Forms in a wide range of geological environments, including igneous, metamorphic, and sedimentary rocks. It crystallizes from silica-rich hydrothermal veins and magma, as well as precipitating in sedimentary settings.
Uses & applications
Used in electronics, oscillators, glassmaking, abrasive materials, and as a popular gemstone and ornamental specimen in jewelry and collecting.
Geological facts
Quartz is one of the most abundant and widely distributed minerals on Earth's continental crust. Its piezoelectric properties make it essential for modern electronics and timekeeping devices.
Field identification & locations
Easily identified by its characteristic 7 Mohs hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in nearly every geological terrain.
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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