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Secondary infilling of a [[vesicle]] in an [[igneous rock]]. [[Mineral]]s that occur as '''amygdales''' include [[quartz]], [[calcite]], and the [[Zeolite Group]].
Pellant, p. 250
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
[[category:geology]]
Pellant, p. 250
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
[[category:geology]]