Fiorite

Fiorite is a hydrated silica rock, a form of opal, found in cavities in volcanic tuff. It is a globular, botryoidal or stalactic concretionary form of opal. It has a pearly lustre and forms botryoidal masses. It was named after Santa Fiora, in Italy. It is used as a gemstone.[1]

Fiorite
General
CategoryMineraloid
Formula
(repeating unit)
SiO2┬ĚnH2O
Identification
Lusterpearly

References

  1. Dictionary of Gems and Gemology By Mohsen Manutchehr-Danai, p.182


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