metamorphic
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂); rock type cannot be confirmed from the photo alone
AI-generated identification · may be incorrectPale gray to cream, translucent in thin areas, with a vitreous to dull luster and irregular fracture. Quartz has Mohs hardness 7 and a hexagonal crystal structure, but the specimen’s grain size and cleavage are not clear enough to identify the rock confidently.
Identified More metamorphic →
Explore Quartz-rich rock, possibly milky quartz or quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Pale gray to cream, translucent in thin areas, with a vitreous to dull luster and irregular fracture. Quartz has Mohs hardness 7 and a hexagonal crystal structure, but the specimen’s grain size and cleavage are not clear enough to identify the rock confidently.
Formation & geological history
Could be a quartz vein fragment or quartz-rich metamorphic rock formed when silica-rich fluids crystallized or sandstone recrystallized. Its age and exact formation setting cannot be determined visually.
Uses & applications
Quartz is used in glass, ceramics, electronics, and abrasives; attractive pieces may be kept as display specimens. This rough fragment does not appear gem quality.
Geological facts
Quartz is one of Earth’s most abundant minerals and lacks cleavage, typically breaking with irregular or conchoidal fractures.
Field identification & locations
The light color and glassy, translucent patches suggest quartz, but a closer view of fresh surfaces and grain boundaries is needed to distinguish massive quartz from quartzite. Quartz occurs worldwide in veins and many rock types.
More like this
