mineral
Milky Quartz
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs), Color: Opaque white, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs), Color: Opaque white, Luster: Vitreous to greasy, Crystal Structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or from hydrothermal veins. It is one of the most common minerals in the Earth's crust and can be billions of years old.
Uses & applications
Used in glassmaking, abrasives, electronics (piezoelectric properties), and as a gemstone or decorative landscaping stone.
Geological facts
Milky quartz gets its white color from millions of tiny fluid bubbles trapped within the crystal during its formation. It is the most common variety of crystalline quartz.
Field identification & locations
Identify by its hardness (scratches glass), waxy luster, and lack of cleavage planes. Found globally, especially in mountain ranges and riverbeds.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral