metamorphic
Yellow Quartzite Pebble
Quartzite (SiO2)
Hardness: 7 (Mohs scale), Color: Yellow to tan (translucent), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.6-2.7
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs scale), Color: Yellow to tan (translucent), Luster: Vitreous to waxy, Crystal Structure: Hexagonal (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.6-2.7
Formation & geological history
Formed from the metamorphism of quartz-rich sandstone under intense heat and pressure. This specimen shows a rounded shape due to water erosion, likely in a riverbed or coastal environment.
Uses & applications
Used primarily in landscaping, construction aggregates, glass making (if high purity), and occasionally as a tumbling stone for beginner collectors.
Geological facts
Quartzite is so hard that it will scratch glass and even steel. Its toughness makes it one of the most resistant rocks to physical and chemical weathering.
Field identification & locations
Identify in the field by its hardness and granular, sugary texture seen under a lens. Found globally in ancient mountain belts and river deposits.
More like this
