A porous or siliceous mineral deposit, especially hydrated silica, formed around geysers and hot springs by the precipitation of mineral-rich water.
From geyser plus the mineral suffix -ite. Geyserite is an actual geological term for silica deposits that form as geyser water cools, named for where it's commonly found. The -ite suffix marks it as a mineral.
Geyserite shows how geology literally names things after their origins—this beautiful mineral is the solid proof that geysers existed, created by the very process that makes them erupt. It's frozen geology!
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