mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White to cloudy translucent, Luster: Vitreous to greasy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to cloudy translucent, Luster: Vitreous to greasy, Crystal Structure: Trigonal/Hexagonal, Cleavage: None (Conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or from hydrothermal veins. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.
Uses & applications
Used in glassmaking, abrasives, electronics (as a source of silicon), construction aggregate, and as a decorative stone in landscaping or jewelry.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety and can often be found as a host mineral for gold in quartz veins.
Field identification & locations
Identify by its ability to scratch glass, its lack of cleavage, and its waxy or vitreous luster. Commonly found in riverbeds, mountain ranges, and sedimentary deposits worldwide.
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Mineral/Rock
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
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Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
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