mineral
Quartz with Tourmaline or Amphibole
Silicon Dioxide with silicate inclusions (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white and gray/black coloration, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Identified More mineral →
Explore Quartz with Tourmaline or Amphibole in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, white and gray/black coloration, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Formed in hydrothermal veins and pegmatites where silica-rich fluids cooled over millions of years, often later water-worn in riverbeds or beaches
Uses & applications
Used in lapidary arts, decorative objects, and crystal collecting
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and exhibits piezoelectric properties
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and characteristic water-worn smooth shape when found in alluvial deposits
More like this
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