Belemnites are the fossilized internal guards (rostra) of extinct squid-like cephalopods from the Mesozoic era. They are typically found as bullet-shaped, solid calcareous structures that are frequently collected along Jurassic and Cretaceous aged coastlines and clay deposits.

Hardness

3-4

Mohs

Luster

Dull to Waxy

Streak

White

Transparency

Opaque

fossilcommon

Belemnite

Also: thunderbolt, devil's finger

Hardness: 3-4
Luster: Dull to Waxy
Streak: White
Transparency: Opaque

Is this belemnite?

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 belemnite with a known reference. Belemnite sits at Mohs 3-4, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Belemnite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Belemnite typically shows a dull to waxy luster.
4
Match the color range
Compare against the expected color range: brown, black, gray, tan.
5
Look at form & habit
Typical habit: rostrum.

Often confused with

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

mineral

Calcite

Mohs 3

How to tell apart: Luster reads dull to waxy on Belemnite and vitreous on Calcite.

Compare →

Often found alongside belemnite

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

All properties

Mohs hardness: 3-4
Density: 2.7-2.9 g/cm³
Colors: Brown Black Gray Tan
Streak: White
Luster: Dull to Waxy
Transparency: Opaque
Crystal habit: Rostrum
Cleavage: None
Rarity: Common
Uses: Collector, Educational, Lapidary
Host rock: Sedimentary Marine Limestone and Shale
Typical price: $2-20 per specimen

Where rockhounds find belemnite

2 mapped spots

Classic worldwide localities

United Kingdom
Germany
Poland
Russia
France

Field-hunting tip

Look in sedimentary marine limestone and shale country, the host setting where belemnite typically forms. If you start seeing calcite, pyrite, ammonites in float, you are in the right ground. Field specimens usually show a rostrum habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in New Jersey. Start trip planning there.

Browse 2 U.S. spots for belemnite →

Common questions

How do you identify belemnite?+

Mohs hardness is 3-4. It typically shows a dull to waxy luster. The streak is white. Common colors include brown, black, gray, tan.

Where is belemnite found?+

Notable localities include United Kingdom; Germany; Poland; Russia; France.

Can I find belemnite in the United States?+

RockHoundR maps 2 belemnite rockhounding spots across 1 U.S. states. The top states are New Jersey.

How much is belemnite worth?+

Typical asking prices fall in the range of $2-20 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like belemnite?+

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

What minerals are found with belemnite?+

Belemnite commonly co-occurs with calcite, pyrite, ammonites. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does belemnite form in?+

Belemnite typically forms in sedimentary marine limestone and shale. Working float back to the host body is the standard way to chase a fresh occurrence.

What is belemnite used for?+

Belemnite is used in collector, educational, lapidary.

Find belemnite on the map

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