Fiorite

Fiorite
Fiorite
General
Category	Mineraloid
Formula; (repeating unit)	SiO2·nH2O
Identification
Crystal habit	Globular, botryoidal, or stalactic
Fracture	Conchoidal
Luster	Pearly

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]

References

^ Manutchehr-Danai, Mohsen (2000). Dictionary of Gems and Gemology. Springer-Verlag. p. 182. ISBN 978-3540674825.

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