mineral
Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
AI-generated identification · may be incorrectHardness: 7 on Mohs scale for quartz; Color: Pinkish-purple to gray with white crystalline patches; Luster: Vitreous to greasy; Crystal structure: Trigonal; Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale for quartz
- Color
- Pinkish-purple to gray with white crystalline patches
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale for quartz; Color: Pinkish-purple to gray with white crystalline patches; Luster: Vitreous to greasy; Crystal structure: Trigonal; Specific Gravity: 2.65
Formation & geological history
Formed via hydrothermal veins or metamorphic processes, where mineral-rich fluids crystallize in cavities of host rock over millions of years.
Uses & applications
Used in mineral collections, lapidary arts, and decorative objects.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Found worldwide in pegmatites, hydrothermal veins, and metamorphic rocks. Identify by its hardness (scratches glass) and crystal habit.
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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