Changes

Relatively large [[crystal]] set into the [[groundmass]] of an [[igneous rock]] to give a [[porphyritic]] texture.

A '''phenocryst''' is a relatively large [[crystal]] set into the [[groundmass]] of an [[igneous rock]] to give a [[porphyritic]] texture.

=Sources=

==Sources==

*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)

*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995), ''p. 251''

[[category:geology]]

[[category:Mineralogy]]