Septarian Nodule Slice
"Dragon Stone" — Calcite, Aragonite, and Limestone Concretion
A polished cross-section revealing nature's own mosaic: gray limestone matrix fractured into bold aragonite veins, opening to a luminous white calcite crystal center. Formed over millions of years in ancient seabed sediment. Backlighting reveals the calcite's warm internal glow against the opaque limestone shell. A striking conversation piece.
