Hypertext Webster Gateway: "geyserite"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Geyserite \Gey"ser*ite\, n. [From {Geyser}.] (Min.)
A loose hydrated form of silica, a variety of opal, deposited
in concretionary cauliflowerlike masses, around some hot
springs and geysers.
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