"GEYSERITE. The variety of opaline silica deposited about the orifices of geysers. It occurs white or grayish, porous, in stalactitic, filamentous, or cauliflower-like forms." -Whitney, 1911

Geyserite

"GEYSERITE. The variety of opaline silica deposited about the orifices of geysers. It occurs white or…