geyserite

noun

gey·​ser·​ite ˈgī-zə-ˌrīt 

 British  ˈgā-sə-

: a variety of opal that is deposited around some hot springs and geysers in white or grayish concretions

Example Sentences

Recent Examples on the Web

In a breakthrough, Djokic and her team found evidence of a rock called geyserite at the Dresser Formation, according to their study published this week in the journal Nature Communications. —Ben Panko, Smithsonian, 11 May 2017

Word History

Etymology

French geysérite, from geyser, from Icelandic Geysir

First Known Use

circa 1814, in the meaning defined above