Definition of geyserite
: a variety of opal that is deposited around some hot springs and geysers in white or grayish concretions
Origin and Etymology of geyserite
French geysérite, from geyser, from Icelandic Geysir
First Known Use: circa 1814See Words from the same year
Seen and Heard
What made you want to look up geyserite? Please tell us where you read or heard it (including the quote, if possible).