
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to translucent with orange/brown iron oxide staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to translucent with orange/brown iron oxide staining
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to translucent with orange/brown iron oxide staining; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or pegmatites where silica-rich fluids cool and crystallize. The orange staining is caused by secondary oxidation of iron-bearing minerals like goethite or hematite infiltrating fractures.
Uses & applications
Industrial use in glassmaking, electronics, and abrasives. As a specimen, it is popular for metaphysical use and beginner rock collecting.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Specimens like this are often called 'Golden Healer' in spiritual circles due to the iron-rich inclusions.
Field identification & locations
Identified by its ability to scratch glass, lack of cleavage, and translucent 'milky' appearance. It is found globally, especially in mountain ranges and riverbeds.
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