Search results

Quartz occurs in [[hydrothermal]] [[Vein (geology)|veins]] as [[gangue]] along with [[ore]] minerals. Large ...crystals are produced in an [[autoclave]] via the [[Hydrothermal synthesis|hydrothermal process]]. The process involves treating crushed natural quartz with hot a

...sses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals ar