Petrified conifer wood disc from Madagascar, Araucaria

A petrified wood slice from Madagascar, from an approximately 220 million year old araucaria, a conifer from the Triassic period. Diamond-cut, ground and polished on one side, without a lacquer layer.

Petrified wood forms when silica-rich groundwater solutions replace the organic wood tissue, cell by cell, molecule by molecule, with quartz. Annual rings, vascular bundles, and medullary rays are preserved one-to-one.

The Madagascan deposits yield araucaria wood from Triassic sediments. The polished cross-section reveals the annual ring stratigraphy; each ring corresponds to one year of growth of the Triassic tree.

A paleobotanical collector's item with documented araucaria provenance, full stratigraphic readability, and a curated cutting strategy.