sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with mineral impurities
Mohs hardness of 6.5 to 7; mottled yellow, brown, and grey colors; waxy to vitreous luster; microcrystalline quartz structure; conchoidal fracture with no true cleavage; specific gravity around 2.58 to 2.91
Identified More sedimentary →
Explore Brecciated Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 6.5 to 7; mottled yellow, brown, and grey colors; waxy to vitreous luster; microcrystalline quartz structure; conchoidal fracture with no true cleavage; specific gravity around 2.58 to 2.91
Formation & geological history
Formed when fractured rock fragments are cemented together by silica-rich fluids in hydrothermal or sedimentary environments, often associated with tectonic fault zones over millions of years
Uses & applications
Used for making cabochons, polished display stones, beads, ornamental carvings, and popular among rockhounds and crystal collectors
Geological facts
Brecciated stones like this jasper record ancient geological trauma, showing where the Earth's crust cracked and healed itself with mineral cement
Field identification & locations
Can be identified by its angular fragments embedded in a contrasting matrix; commonly found in riverbeds, glacial tills, and areas with historical tectonic activity
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary