Glossary · Minerals
Septarian
A concretion cracked internally by shrinkage and then filled with mineral veins (usually calcite, sometimes barite or aragonite) that form a pattern of polygons; cut and polished as “septarian nodules” and “dragon stone”.
A concretion cracked internally by shrinkage and then filled with mineral veins (usually calcite, sometimes barite or aragonite) that form a pattern of polygons; cut and polished as “septarian nodules” and “dragon stone”.
Sources
Cite this article
Stratum Study. "Septarian" (Glossary). Stratum Study pack 2026.09, as of 2026-09-16. https://stratum.black/study/glossary/septarian. Accessed 2026-09-20.
@misc{stratum-septarian,
title = {Septarian},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/glossary/septarian}},
year = {2026},
note = {Glossary article, Stratum Study pack 2026.09, as of 2026-09-16; sources: stratum. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.