Brecciated Jasper
Silicon dioxide (SiO2) with iron oxide
A jasper made of angular fragments naturally cemented back together, typically showing red and brown pieces in a quartz matrix.
- Mohs hardness
- 6.5-7
- Color
- red, brown, and tan angular fragments with gray or clear veining
- Type
- sedimentary
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Overview
Brecciated jasper is a jasper that was broken into angular fragments and then naturally cemented back together by silica-rich solutions, often quartz or chalcedony. The result is a mosaic of jasper chunks, frequently red and brown from iron oxide, set in a paler veining matrix.
The word brecciated refers to this fragmented-and-rehealed texture, which gives the stone a distinctive patchwork or shattered appearance. It is opaque, hard, and takes an excellent polish.
It is common, affordable, and a staple of beads, cabochons, and tumbled stones.
Formation & geology
Brecciated jasper forms in two stages. First, an existing jasper is fractured by tectonic stress, faulting, or volcanic activity into angular fragments. Then silica-bearing groundwater percolates through the broken rock and deposits quartz or chalcedony cement that binds the fragments into a solid mass.
The red and brown colors come from hematite and other iron oxides in the original jasper, while the veins between fragments are often clearer quartz.
It occurs worldwide wherever iron-rich jasper has been fractured and recemented; India, South Africa, and the USA are common sources.
How to identify it
Look for angular, sharp-edged fragments of jasper, usually red and brown, separated by lighter quartz veins, all forming one solid, hard stone. The pieces fit together like a broken puzzle, the hallmark of a breccia.
It is opaque with a dull to waxy luster, white streak, and hardness 6.5-7. Distinguish it from poppy jasper (rounded orbicular spots rather than angular fragments) and from ordinary red jasper (uniform, without the fragmented veining).
The angular, recemented texture is the key identifier.
Uses & significance
Brecciated jasper is widely cut into beads, cabochons, spheres, and tumbled stones, prized for its bold red patterns at low cost. Its hardness and lack of cleavage make it durable for everyday jewelry and carving.
It has no major industrial use. Metaphysically it is marketed as a grounding, stabilizing stone, sometimes called a stone of organization, though such claims are not scientific.
Its abundance keeps it affordable and popular among hobbyists.
Frequently asked questions
What does brecciated mean?
It means the rock was broken into angular fragments that were later naturally cemented back together, usually by silica.
Why is brecciated jasper red?
Iron oxides such as hematite color the jasper fragments red and brown.
Is brecciated jasper the same as poppy jasper?
No. Poppy jasper has rounded orbicular spots, while brecciated jasper has angular, recemented fragments.
Is brecciated jasper durable?
Yes. At 6.5-7 Mohs with no cleavage, it holds up well in jewelry and carvings.
Brecciated Jasper guides
In-depth guides for identifying, valuing, and understanding Brecciated Jasper.
Brecciated Jasper identified by the community
Real specimens identified with Rock Identifier.
