Secondary infilling of a [[vesicle]] in an [[igneous rock]]. [[Mineral]]s that occur as '''amygdales''' include [[quartz]], [[calcite]], and the [[Zeolite Group]]. | Secondary infilling of a [[vesicle]] in an [[igneous rock]]. [[Mineral]]s that occur as '''amygdales''' include [[quartz]], [[calcite]], and the [[Zeolite Group]]. |