mineral
Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony
Quartz (SiO₂), potentially microcrystalline quartz (chalcedony)
AI-generated identification · may be incorrectHardness 7 (quartz) or about 6.5–7 (chalcedony); translucent honey-brown to clear, vitreous to waxy luster, with no obvious cleavage and conchoidal fracture. The coloration likely comes from iron-oxide staining or inclusions.
Identified More mineral →
Explore Quartz-rich translucent pebble, possibly iron-stained quartz or chalcedony in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 7 (quartz) or about 6.5–7 (chalcedony); translucent honey-brown to clear, vitreous to waxy luster, with no obvious cleavage and conchoidal fracture. The coloration likely comes from iron-oxide staining or inclusions.
Formation & geological history
Likely formed when silica precipitated in cavities or fractures, later weathering into a stream pebble; the exact geological age and host rock cannot be determined from the photograph. Its rounded form indicates water transport.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive translucent pieces may be used as lapidary material or inexpensive specimens.
Geological facts
Quartz is one of Earth’s most abundant minerals and is resistant to chemical and physical weathering, allowing it to accumulate in streambeds.
Field identification & locations
Look for glassy translucence, conchoidal fracture, lack of cleavage, and inability to scratch it with a steel knife; an iron-stained quartz pebble is common in stream gravels. A hardness or streak test would help distinguish it from calcite or colored glass.
