Fiorite

Form of opal
(repeating unit)SiO2·nH2OIdentificationCrystal habitGlobular, botryoidal, or stalacticFractureConchoidalLusterPearly

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

See also

  • Geyserite

References

  1. ^ Manutchehr-Danai, Mohsen (2000). Dictionary of Gems and Gemology. Springer-Verlag. p. 182. ISBN 978-3540674825.
  • Mindat with location data


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