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→Sources: clean up & uniformity
=Sources=
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995), p. 251
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995), p. 251
[[category:geology]]
[[Category:Geology]]