Geyserite

Geyserite from Iceland

Geyserite is a form of opaline silica that is often found around hot springs and geysers. Botryoidal geyserite is known as fiorite. It is sometimes referred to as sinter.

References

Mindat with location data

Geyserite basin at Chinese Spring, Upper Geyser Basin, Yellowstone

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Silica minerals

Crystalline

Coesite
Cristobalite
Keatite
Moganite
Quartz
Seifertite
Stishovite
Tridymite

Cryptocrystalline

Chalcedony
Chert
Flint
Jasper

Amorphous

Fulgurite
Lechatelierite
Opal

Miscellaneous

Tiger's eye

Notable varieties

Chalcedony	Agate Carnelian Chrysoprase Heliotrope Onyx

Opal	Fiorite Geyserite

Quartz	Amethyst Ametrine Prasiolite Smoky quartz Shocked quartz

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