Rock Family: Sedimentary Rock Major Minerals: Aragonite, Betonite (Volcanic Ash), Calcite Minor Minerals: Bartite
Color: Yellow, Grey, Brown and Clear Gravity: Varies, 2.60-2.94 Hardness: Varies, 1.5-4 Luminescence: Pink and Yellowish-white (long wave) / Blue and Blueish-white (short wave) Texture: Concretion Transparency: Opaque
Where does Septarian Nodule come from?
Septarian Nodule deposits have been found in Australia, Canada, England, Madagascar, Morocco, New Zealand, Spain and the United States (Utah).
What is a Septarian Nodule?
Septarian Nodules are not a mineral, but rather a very unique kind of sedimentary rock. An easy way to understand the difference is that rocks are like cookies and minerals are ingredients such as flour or sugar. Many different minerals are used to create a rock! Septarian Nodules combine Aragonite, Betonite, Calcite and may occasionally include white/clear Bartite.
How is Septarian Nodule formed?
Septarian Nodules were formed at the end of the Cretaceous Period (145 million -65 million BCE). At that time, the oceans were larger and extended far inland. Regular volcanic eruptions spewed ash and lava in to the oceans, killing the coastal sea life where it fell, and trapping their bodies in the sediment, forming little clay balls, composed mainly of grey Betonite. When the ocean receded, these mudballs would dry out and crack. When the ocean returned, it deposited more sentiment and broken shells on top of the cracked Betonite clay balls. Calcite crystals began to form out of the shell fragments in the cracks, taking on a bright yellow luster. In between the Calcite and the Betonite, a thin wall of dark brown Argaonite formed.
Septarian Nodules are mined in their primary location. Unless already broken, Septarian Nodules are mined as rounded geodes, which are then cut open and polished. At one time, they could be picked off the surface of the ground, but today they require a little digging, which may be done by hand or by bulldozer.
Are Septarian Nodules real?
All Septarian Nodules are completely natural, enhanced only by cutting, and polishing.
Julie Abouzelof is the owner of Moonrise Crystals and an advocate for responsibly sourced gems and minerals. Her first career was in education teaching history, geology and anthropology, as well as working with special-needs students. She is now a heart-centered entrepreneur who encourages mindfulness and positive action to heal ourselves and the world. Julie lives in Hawaii with her lover and a little parrot named Darwin. She is rarely on social media, but enjoys connecting via email.