mineral
Milky quartz fragment
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite to translucent, glassy-to-waxy luster, irregular fracture, and no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. The chunky shape and pale color are consistent with massive milky quartz, though fine details are limited.
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Physical properties
White to translucent, glassy-to-waxy luster, irregular fracture, and no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. The chunky shape and pale color are consistent with massive milky quartz, though fine details are limited.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, commonly in igneous and metamorphic rocks. Quartz is widespread from Precambrian to modern geological settings.
Uses & applications
Used for glass, ceramics, engineered stone, abrasives, and electronics; attractive pieces may be collected or used decoratively. This small rough fragment has minimal commercial value.
Geological facts
Quartz is one of Earth’s most abundant minerals and has a framework crystal structure. Its white appearance results mainly from microscopic fluid inclusions and fractures scattering light.
Field identification & locations
Identify it by its hardness, pale color, glassy luster, and lack of cleavage: it should scratch ordinary glass but not be scratched by a steel knife. Common worldwide in quartz veins, granite, pegmatite, sandstone, and metamorphic rocks.
