Breccia is a clastic sedimentary rock composed of broken angular fragments of minerals or rock cemented together by a fine-grained matrix. Unlike conglomerate, the particles in breccia are sharp and angular, indicating they have not traveled far from their source before lithification.

Hardness

3-7

Mohs

Luster

Dull

Streak

Variable

Transparency

Opaque

sedimentarycommon

Breccia

Hardness: 3-7
Luster: Dull
Streak: Variable
Transparency: Opaque

Is this breccia?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch breccia with a known reference. Breccia sits at Mohs 3-7 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Breccia leaves a variable streak.
3
Read the luster
Hold the specimen under a strong light. Breccia typically shows a dull luster.
4
Match the color range
Compare against the expected color range: gray, brown, red, white, variegated.
5
Look at form & habit
Typical habit: massive.

Often confused with

Breccia vs. its common look-alikes — and how to tell them apart in the field.

sedimentary

Puddingstone

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Often found alongside breccia

Minerals reported to co-occur with breccia. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Mohs hardness: 3-7
Density: 2.0-2.8 g/cm³
Colors: Gray Brown Red White Variegated
Streak: Variable
Luster: Dull
Transparency: Opaque
Crystal habit: Massive
Cleavage: None
Rarity: Common
Uses: Decorative, Architectural, Collector
Host rock: Sedimentary Basins, Fault Zones, Volcanic Pipes
Typical price: $5-50 for small polished samples, higher for large decorative slabs.

Where rockhounds find breccia

Classic worldwide localities

worldwide
Italy
Greece
USA

Field-hunting tip

Look in sedimentary basins, fault zones, volcanic pipes country — that is the host setting where breccia typically forms. If you start seeing calcite, quartz, limonite in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify breccia?+

Mohs hardness is 3-7. It typically shows a dull luster. The streak is variable. Common colors include gray, brown, red, white.

Where is breccia found?+

Notable localities include worldwide; Italy; Greece; USA.

How much is breccia worth?+

Typical asking prices fall in the range of $5-50 for small polished samples, higher for large decorative slabs.. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like breccia?+

Breccia is most often confused with Puddingstone. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with breccia?+

Breccia commonly co-occurs with calcite, quartz, limonite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does breccia form in?+

Breccia typically forms in sedimentary basins, fault zones, volcanic pipes. Working float back to the host body is the standard way to chase a fresh occurrence.

What is breccia used for?+

Breccia is used in decorative, architectural, collector.

Find breccia on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.