mineral
Milky quartz fragment
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectTypically Mohs hardness 7, white to translucent, with a glassy to waxy luster and conchoidal fracture; crystals are trigonal, though this fragment shows no complete crystal form. Specific gravity is about 2.65.
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Physical properties
Typically Mohs hardness 7, white to translucent, with a glassy to waxy luster and conchoidal fracture; crystals are trigonal, though this fragment shows no complete crystal form. Specific gravity is about 2.65.
Formation & geological history
Likely formed from silica-rich hydrothermal veins or igneous pegmatites; quartz ranges from Precambrian to recent in age. The irregular, pale piece may be naturally broken or lightly processed.
Uses & applications
Used for glass, ceramics, engineered stone, abrasives, electronics, and decorative specimens; milky quartz has limited gemstone value.
Geological facts
Its cloudiness results from microscopic fluid inclusions, fractures, or mineral impurities. Quartz is one of Earth’s most abundant and chemically durable minerals.
Field identification & locations
Identify it by its hardness, lack of cleavage, glassy fracture, and inability to scratch with a steel knife while scratching ordinary glass. Common worldwide, especially in quartz veins, granites, and metamorphic rocks.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary