Septarian Spheres from South Africa
Beautifully polished septarian spheres carefully chosen for our collection of rocks and minerals.
Although often described as a mineral, septarian is a rock, more correctly known as a septarian nodule or concretion. Sometimes described as a geological curiosity, septarian is composed of calcite, aragonite and limestone.
Septarian formed around the time dinosaurs disappeared and are sometimes described as a prehistoric mud ball.
Although well polished, septarian often has minor indentations or anomalies.
