mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite to translucent, with a glassy-to-greasy luster and irregular fracture; trigonal crystal structure, no cleavage, Mohs hardness 7, and specific gravity about 2.65. The image is consistent with rough milky quartz, though appearance alone cannot confirm the identification.
Identified More mineral →
Explore Milky quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
White to translucent, with a glassy-to-greasy luster and irregular fracture; trigonal crystal structure, no cleavage, Mohs hardness 7, and specific gravity about 2.65. The image is consistent with rough milky quartz, though appearance alone cannot confirm the identification.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or as grains in igneous and metamorphic rocks; quartz occurs in rocks spanning much of Earth’s history.
Uses & applications
Used as a silica source in glass and industrial products, and as an inexpensive ornamental or lapidary material.
Geological facts
Quartz is one of Earth’s most abundant minerals; its hardness lets it scratch glass and resist weathering.
Field identification & locations
Common worldwide, especially in quartz veins and pegmatites. Look for glassy luster, hardness near 7, and absence of cleavage; a scratch test is more reliable than color.
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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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