Starfish fossils are the preserved remains of echinoderms, often showing distinct five-armed symmetry preserved in sedimentary matrix. They are highly prized by collectors for their detailed skeletal plates, typically found in marine-deposited shales and limestones. Look for specimens in areas formerly covered by ancient oceans, where rapid burial preserved the delicate structure before decomposition.
Is this starfish fossil?
3-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Name the organismDecide what left the fossil before worrying about the rock. Organism: Starfish (class Asteroidea) and brittle stars (class Ophiuroidea). Age: Ordovician (about 450 million years ago) to recent.
- 2Check the preservationPreservation: Usually only calcite ossicles and spines survive. That controls the weight, the hardness and how the piece takes a polish.
- 3Match the color rangeCompare against the expected color range: gray, brown, tan, white, beige.
Often found alongside starfish fossil
Minerals reported to co-occur with starfish fossil. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Rarity
- Uncommon
- Uses
- Collector, Scientific study
- Host rock
- sedimentary limestone or shale
- Organism
- Starfish (class Asteroidea) and brittle stars (class Ophiuroidea)
- Age
- Ordovician (about 450 million years ago) to recent
- Preservation
- Usually only calcite ossicles and spines survive
Where rockhounds find starfish fossil
Classic worldwide localities
- Morocco
- United Kingdom
- United States
- Czech Republic
- Germany
Field-hunting tip
Where it forms: sedimentary limestone or shale. If you start seeing calcite, pyrite in float, you are in the right ground.
Common questions
Where is starfish fossil found?+
What minerals are found with starfish fossil?+
What kind of rock does starfish fossil form in?+
What is starfish fossil used for?+
Find starfish fossil on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
