Septarian Sphere - Premium-Grade Stone
A beautifully polished septarian sphere, carefully chosen for our collection of rocks and minerals.
Although often described as a mineral, septarian is a rock, correctly known as a septarian nodule or concretion.
Composed of calcite, aragonite, and limestone, septarian formed around the time dinosaurs disappeared.
Although finely polished, it often has minor indentations or anomalies, particularly in the yellow calcite, which is particularly soft.