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Brilliant play of bright colors, often produced by minute rodlike [[intrusion]]s of, for example, [[iron oxide]], in certain [[mineral]]s.
Pellant, p. 251
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
[[category:geology]]
Pellant, p. 251
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
[[category:geology]]