Description
This 3-inch sand dollar fossil reveals exquisite natural symmetry preserved in limestone from the coastal beds of Madagascar. Cleaned and polished by hand to highlight the five-armed petal pattern, each specimen displays subtle cream, tan, and coral tones. The surface retains traces of original shell texture, creating a tangible connection to Earth’s prehistoric oceans.
Geological Background
Sand dollars are the flattened relatives of sea urchins and belong to the Echinoid class of marine invertebrates. This specimen dates to the Miocene Epoch (~23 – 5 million years ago) when warm shallow seas covered parts of what is now Madagascar. Over time, silts and carbonates encased the shells, and calcite slowly replaced the original aragonite, preserving their distinct radiating pattern.
| Property | Value |
|---|---|
| Fossil Type | Echinoid (Sand Dollar) |
| Composition | Calcite-replaced carbonate shell |
| Era / Age | Cenozoic – Miocene (~20 Ma) |
| Mohs Hardness | 3 (Calcite) |
| Locality / Formation Type | Coastal limestone beds, Madagascar |
History & Cultural Context
Sand dollars have long fascinated collectors for their geometric beauty and symbolism. In many cultures, the five-petal design represents balance and rebirth — themes echoed in marine mythology. Madagascar’s fossil beds yield exceptionally detailed examples thanks to fine-grained carbonate sediments that captured delicate surface structures in stone.
Aesthetic & Collector Evaluation
Each specimen is unique in tone and relief depth. The 3-inch size makes it a perfect display piece for curio cabinets or educational collections. Viewed under soft light, the radiating star pattern shows three-dimensional definition — a hallmark of well-preserved echinoid fossils.
Metaphysical Notes
Sand dollars symbolize peace and renewal, mirroring the rhythm of the sea and the cycles of life. As a fossil, they are also linked to ancient memory and continuity, making them meaningful tokens for those drawn to oceanic energy.
Care & Handling
Handle gently to avoid chipping. Clean only with a soft brush or dry cloth. Avoid prolonged contact with water or acidic cleaners to protect calcite structure and color.








