mineral
Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Color ranges from colorless (rock crystal) to various shades of white, gray, purple, pink, etc. Luster is vitreous (glassy). Crystal system is hexagonal (trigonal). No true cleavage, exhibits conchoidal fracture. Specific gravity is 2.65.
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Physical properties
Hardness of 7 on the Mohs scale. Color ranges from colorless (rock crystal) to various shades of white, gray, purple, pink, etc. Luster is vitreous (glassy). Crystal system is hexagonal (trigonal). No true cleavage, exhibits conchoidal fracture. Specific gravity is 2.65.
Formation & geological history
Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks. Commonly crystallizes from silica-rich hydrothermal veins and pegmatites.
Uses & applications
Used in electronics (oscillators, watches), glassmaking, abrasives, gemstones, and ornamental objects.
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electric charge in response to applied mechanical stress.
Field identification & locations
Easily identified by its distinct hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in almost every rock type.
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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