CORALLOID ARAGONITE (Portugal)
PUMI2702
In mineralogy, the term coralloid is used for ARAGONITE growths made of small rounded aggregates resembling coral structures. These formations develop in karstic cavities, where slightly supersaturated calcium-carbonate waters slowly deposit successive layers around microscopic nuclei.
The central regions of Portugal are particularly noted for yielding coralloid aragonites of exceptional purity and whiteness, largely free of iron oxide staining.
This specimen is displayed under a rectangular glass dome with a black wooden base, emphasising its three-dimensional structure while protecting the delicate surface.
The central regions of Portugal are particularly noted for yielding coralloid aragonites of exceptional purity and whiteness, largely free of iron oxide staining.
This specimen is displayed under a rectangular glass dome with a black wooden base, emphasising its three-dimensional structure while protecting the delicate surface.
