mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 (Mohs scale), Color: Opaque white to milky white, Luster: Vitreous to waxy (when river-worn), Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Opaque white to milky white, Luster: Vitreous to waxy (when river-worn), Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Formed through hydrothermal processes or within igneous and metamorphic rocks. This specific specimen shows roundness typical of alluvial or river transport, where mechanical erosion has smoothed its edges over time.
Uses & applications
Used in glass manufacturing, electronics (due to piezoelectric properties), construction aggregates, and as tumbled stones for landscaping or metaphysical collections.
Geological facts
Milky quartz gets its cloudy appearance from minute fluid inclusions of gas or liquid trapped during the crystal's growth. It is one of the most common and widely distributed minerals on Earth's crust.
Field identification & locations
Identify in the field by its hardness (will scratch glass), lack of cleavage, and white color. It is commonly found in riverbeds, beaches, and as veins in mountain ranges globally.
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
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