mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs), Color: Opaque white, Luster: Vitreous to greasy, Crystal structure: Hexagonal/Trigonal, Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs), Color: Opaque white, Luster: Vitreous to greasy, Crystal structure: Hexagonal/Trigonal, Specific gravity: 2.65
Formation & geological history
Formed through hydrothermal processes in veins, pegmatites, and cooling magma; widely found in crustal rocks across various geological ages.
Uses & applications
Used in glass manufacturing, electronics, abrasives, construction aggregates, and as tumbled stones for decoration or metaphysical use.
Geological facts
Milky quartz is the most common variety of crystalline quartz. Its white color comes from tiny fluid inclusions of gas or liquid trapped during crystal growth.
Field identification & locations
Identify by its ability to scratch glass, its milky opacity, and conchoidal fracture. Extremely common globally in mountain ranges and riverbeds.
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Arenite (SiO2 based)
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river 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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