Mined from: Madagascar

Era: Cretaceous period
Geological Age: Approximately 145 mya

Description: Delicately preserved and geologically ancient, this fossilized heart urchin hails from the Cretaceous Period—approximately 145 million years ago—off the fossil-rich coasts of Madagascar. These extinct echinoids, often called "spatangoids," showcase the signature heart-shaped symmetry that gave them their nickname. Their finely detailed exoskeletons (or tests) exhibit stunning natural etchings, once used to channel sediment across their bodies as they burrowed through the seafloor.

These urchins lived during an age of dinosaurs, flowering plants, and rising sea levels, offering a literal snapshot of marine life when much of Earth was a warm, shallow ocean. Today, their fossils are prized not only for their unique shape but also for their excellent preservation in Madagascar's limestone-rich deposits. Subtle radial patterns and the unmistakable heart form make each piece a naturally sculpted relic of evolutionary history.

Small
Approximate Size of 1 piece: 3cm x 3cm x 2.5cm
Approximate Weight of 1 piece: 30g

Medium
Approximate Size of 1 piece: 3.5cm x 3.5cm x 2.5cm
Approximate Weight of 1 piece: 40g

Large
Approximate Size of 1 piece: 4cm x 4cm x 3cm
Approximate Weight of 1 piece: 60g

Quantity: 1pc

We do our best to buy quality products- although not every rock is the same. If you choose to purchase the "staff pick option", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.