metamorphic
Rounded river pebble, likely quartzite
Quartzite (predominantly recrystallized quartz, SiO₂); identification is uncertain from the image alone
AI-generated identification · may be incorrectGray-tan, rounded, fine-grained and dull to slightly sparkly; quartzite is typically Mohs 7, with interlocking quartz crystals and no prominent cleavage. The pebble’s specific gravity is not measurable from the image.
Identified More metamorphic →
Explore Rounded river pebble, likely quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray-tan, rounded, fine-grained and dull to slightly sparkly; quartzite is typically Mohs 7, with interlocking quartz crystals and no prominent cleavage. The pebble’s specific gravity is not measurable from the image.
Formation & geological history
Likely a quartz-rich rock transformed by heat and pressure from sandstone, then rounded by water or glacial transport; its age and original source cannot be determined visually.
Uses & applications
Small quartzite pebbles are used in landscaping and decorative stone; this appears to be a common, modest-value specimen.
Geological facts
Quartzite is very hard and commonly resists weathering, allowing it to persist as smooth stream or beach pebbles.
Field identification & locations
A quartzite pebble often has a sugary or fused-grain texture and scratches glass; common in river, beach, and glacial deposits worldwide. A close-up or hardness test would help distinguish it from other gray river stones.
More like this
