Geyserite
Image: <a href="//commons.wikimedia.org/wiki/User:Archaeodontosaurus" title="User:Archaeodontosaurus">Didier Descouens</a> (CC BY-SA 4.0)
Mineral NameGeyserite
Chemical FormulaSiO₂·nH₂O
Mohs Hardness5.5
Crystal Systemamorphous
Lusterdull
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.1
Colorslight beige, tan, brownish-white
Transparencyopaque
Type LocalityIceland
Mineral GroupSilicates
Usescollector, scientific study
Associated Mineralschalcedony, quartz, calcite
Rarityuncommon
Description
A light beige to brownish-white, irregularly shaped rock fragment exhibiting fossilized plant structures, likely stems or leaves, embedded within its textured surface.
Geological Context
Geyserite forms from the rapid precipitation of amorphous silica from silica-rich hot spring and geyser waters, often encrusting and preserving organic material like plants, as seen in this fossil.
