Sedimentary Rocks · common
Breccia
Breccia is rock composed of broken fragments in a matrix.
Breccia properties at a glance
| Type | Sedimentary Rocks |
|---|---|
| Chemical formula | Variable mineral composition |
| Mohs hardness | 3.5 |
| Luster | varies |
| Streak | Variable; test individual minerals |
| Cleavage | Variable by mineral grains |
| Fracture | Uneven to granular |
| Specific gravity | 2.4 |
| Transparency | opaque |
| Common colors | Various |
| Rarity | common |
Geology & background
Forms through deposition, compaction, cementation, or chemical precipitation at or near Earth's surface.
Breccia helps geologists interpret the environment and processes that formed a landscape.
How to identify Breccia
- Compare the specimen's color, luster, crystal habit, grain size, streak, and locality before confirming.
- Use multiple photos when possible, including a fresh surface and a close view of texture.
Full Breccia identification guide: checklist, home tests and look-alikes →
Breccia vs similar stones
Not sure it isn't something else? Side-by-side comparisons with the stones most often confused with Breccia.
Where Breccia is found
Reported from multiple localities worldwide; verify locality against specimen provenance when available.
How much is Breccia worth?
| Entry-level specimen | $1 |
|---|---|
| Typical collector specimen | $10 |
| Premium specimen | $75+ |
Value depends on size, crystal quality, color, locality, rarity, damage, and provenance.
Common uses
- Field identification
- Fossil and depositional environment study
- Construction or aggregate when suitable
- Education
Interesting facts
- Breccia is useful for field identification because texture, color, luster, and context can narrow the match.
- Specimens labeled Breccia can vary by locality, weathering, impurities, and crystal or grain size.
- A fresh surface and multiple photos usually improve identification confidence.
Care & safety
Handle as a collector specimen until hardness, cleavage, and fracture are verified.
Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a proper respirator.
Breccia FAQ
What is Breccia?
Breccia is rock composed of broken fragments in a matrix.
How much is Breccia worth?
Entry-level Breccia specimens sell for around $1, a typical collector specimen for about $10, and premium pieces for $75 or more. Value depends on size, crystal quality, color, locality, rarity, damage, and provenance.
How hard is Breccia?
Breccia has a Mohs hardness of 3.5. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not.
What is Breccia used for?
Breccia is used for field identification, fossil and depositional environment study, construction or aggregate when suitable, and education.
