metamorphic
Rounded beach pebble (likely quartzite)
Quartzite, composed predominantly of quartz (SiO₂)
AI-generated identification · may be incorrectCream to pale tan with rusty-orange staining and a smooth, rounded surface. Quartz hardness is 7 Mohs; quartzite is typically massive, non-cleavable, and has a vitreous to dull luster. The image alone cannot confirm its composition.
Identified More metamorphic →
Explore Rounded beach pebble (likely quartzite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Cream to pale tan with rusty-orange staining and a smooth, rounded surface. Quartz hardness is 7 Mohs; quartzite is typically massive, non-cleavable, and has a vitreous to dull luster. The image alone cannot confirm its composition.
Formation & geological history
If quartzite, it formed when quartz-rich sandstone was recrystallized by heat and pressure; its rounded shape likely resulted from prolonged water transport. Its age and geological source cannot be determined from the photo.
Uses & applications
Small pebbles are commonly collected or used decoratively; quartzite is also quarried for aggregate, paving, and building stone.
Geological facts
Iron-oxide staining can produce the yellow, orange, or brown patches often seen on quartz-rich stones.
Field identification & locations
A hard, quartz-rich pebble commonly resists scratching by a steel knife and has no visible cleavage; confirm quartzite by examining a fresh surface. Rounded pebbles occur on beaches and in riverbeds worldwide.
More like this
