What is Elpidite?
Elpidite is a hydrated zirconium silicate of alkaline complexes, commonly forming fibrous or radiating aggregates in pale colours.
Mineralogy and structure
Reference formula: Na2ZrSi6O15·3H2O. Elpidite is a framework silicate with channels and variable cation occupancy. Calcium-bearing natural samples are common, so the COD image is labelled as representative.
Colour and appearance
Typical colours include colourless, white, pale yellow, pink. The usual fibrous, prismatic, radiating habit and vitreous, pearly lustre are useful descriptive features, but colour alone is not diagnostic.
Formation and localities
Elpidite forms in or is associated with alkaline and agpaitic nepheline syenites, pegmatites and late-stage cavities. Important documented localities include the Kola Peninsula, Russia, Greenland, Canada and other alkaline complexes.
Collecting and care
Handle fine fibres gently and keep specimens dry; do not assume pale fibrous aggregates are safe to inhale when broken.
Elpidite in popular symbolism
Modern crystal guides sometimes associate Elpidite with symbolic themes based on colour or collecting tradition. These associations are cultural interpretations, not mineralogical or medical properties.
