Fiorite

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Fiorite is a hydrated silica rock, a form of opal, found in cavities in volcanic tuff. It has a pearly lustre and forms botryoidal masses. It was named after Fiora, Ischia, in Italy.

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Silica minerals

Crystalline

Coesite · Cristobalite · Moganite · Quartz · Stishovite · Tridymite

Cryptocrystalline

Chalcedony · Chert · Flint · Jasper

Amorphous

Fulgurite · Lechatelierite · Opal

Miscellaneous

Quartzite · Tiger's eye · Vitreous quartzite

Notable varieties

Chalcedony	Agate · Carnelian · Chrysoprase · Heliotrope · Moss agate · Lake Superior agate · Onyx · Sard

Jasper / Chert	Mozarkite · Orbicular jasper

Opal	Fiorite · Geyserite

Quartz	Amethyst · Ametrine · Citrine · Milky quartz · Rose quartz · Smoky quartz · Shocked quartz

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