Calymene is a genus of trilobites commonly found in Silurian and Ordovician marine sedimentary rocks. They are highly prized by collectors for their ability to enroll into a ball-like shape as a defense mechanism, which is frequently preserved in fossil specimens.
Often confused with
Calymene vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside calymene
Minerals reported to co-occur with calymene. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Rarity
- Common
- Uses
- Collector, Educational, Display
- Host rock
- Sedimentary Shale and Limestone
- Typical price
- $10-150 depending on preservation and size
Where rockhounds find calymene
Classic worldwide localities
- USA (Ohio)
- USA (Indiana)
- United Kingdom (Dudley)
- Canada (Ontario)
- Morocco
Field-hunting tip
Look in sedimentary shale and limestone country — that is the host setting where calymene typically forms. If you start seeing calcite, dolomite, pyrite in float, you are in the right ground.
Common questions
Where is calymene found?+
Notable localities include USA (Ohio); USA (Indiana); United Kingdom (Dudley); Canada (Ontario); Morocco.
How much is calymene worth?+
Typical asking prices fall in the range of $10-150 depending on preservation and size. Quality, size, and provenance can move individual specimens well outside that range.
What rocks look like calymene?+
Calymene is most often confused with Phacops. A quick hardness test and a streak check separate the look-alikes faster than color alone.
What minerals are found with calymene?+
Calymene commonly co-occurs with calcite, dolomite, pyrite. Spotting any of these in float or country rock is a useful trip signal.
What kind of rock does calymene form in?+
Calymene typically forms in sedimentary shale and limestone. Working float back to the host body is the standard way to chase a fresh occurrence.
What is calymene used for?+
Calymene is used in collector, educational, display.
Find calymene on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
