mineral
Milky Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: White to tan/brownish; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- White to tan/brownish
- Luster
- Vitreous to greasy
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
Hardness: 7 (Mohs scale); Color: White to tan/brownish; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Forms through the hydrothermal crystallization of silica-rich fluids in veins or pegmatites. It is one of the most abundant minerals and can form in igneous, sedimentary, and metamorphic environments.
Uses & applications
Used as a source of silicon for electronics, as an abrasive, in glassmaking, as decorative landscaping stone, and occasionally for healing crystals or low-cost lapidary carvings.
Geological facts
The milky appearance is caused by tiny fluid inclusions of gas and/or liquid trapped during the crystal's growth. It is the most common variety of crystalline quartz.
Field identification & locations
Identified by its hardness (scratches glass), white/cloudy appearance, and lack of cleavage. Commonly found in riverbeds, mountains, and as vein material in many geological formations worldwide.
