mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to translucent with reddish-orange iron oxide staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- White to translucent with reddish-orange iron oxide staining
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to translucent with reddish-orange iron oxide staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed from silica-rich hydrothermal fluids cooling in veins and pegmatites. These specimens are ubiquitous across almost all geological ages and environments, particularly in igneous and metamorphic terrains.
Uses & applications
Used in glass manufacturing, electronics (piezoelectricity), construction aggregate, jewelry, and as a popular specimen for beginner mineral collectors.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The 'milky' appearance is caused by tiny bubbles of gas or liquid trapped during crystal growth.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and translucent white color. It is commonly found in stream beds, gravel pits, and mountain ranges worldwide.
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