Trilobites are extinct marine arthropods characterized by their distinct three-lobed body structure and calcified exoskeleton. Collectors look for fully articulated specimens preserved in shale or limestone, often extracted with delicate tools to reveal intricate details like eyes and appendages. They are widely distributed in Paleozoic marine deposits across the globe.
Often found alongside trilobites
Minerals reported to co-occur with trilobites. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Rarity
- Common
- Uses
- Collector, Decorative, Educational
- Host rock
- Sedimentary Rocks Like Shale and Limestone
- Typical price
- $5-50 common specimens, $100-5000+ for rare or large prepared specimens
Where rockhounds find trilobites
2 mapped spotsClassic worldwide localities
- Morocco
- USA (Utah)
- USA (Ohio)
- Russia
- Canada (British Columbia)
Field-hunting tip
Look in sedimentary rocks like shale and limestone country — that is the host setting where trilobites typically forms. If you start seeing calcite, pyrite, quartz in float, you are in the right ground. In the U.S., the densest reported localities are in Indiana, Wisconsin — start trip planning there.
Common questions
Where is trilobites found?+
Can I find trilobites in the United States?+
How much is trilobites worth?+
What minerals are found with trilobites?+
What kind of rock does trilobites form in?+
What is trilobites used for?+
Find trilobites on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
