Blue-grey agate geode with rock crystal on anhydrite, as a table, super rare

A blue-grey agate geode with rock crystal on anhydrite, mounted as a table. Three minerals in a deposit constellation that rarely occurs together in the collector's market.

Anhydrite (CaSO₄) is the anhydrous calcium sulfate form that crystallizes in saline sedimentary deposits. The constellation of an agate geode on an anhydrite matrix documents a rare deposit connection between volcanic geode material and marine-evaporitic anhydrite.

Rock crystal, as a pure quartz phase, grew in the geode cavity after the agate microcrystal phase. The three-mineral constellation of agate + rock crystal + anhydrite in one piece is exceptional.

The table processing is a curatorial staging decision. The premium mineralogical piece is presented as a functional furniture element, with insight into the full geode microstructure.

A museum-worthy collector's item with three-mineral genesis, curatorial table staging, and architectural gallery dimension.