This edition updates the fourth edition that was published in 2002. The number of pages has remained the same; however, the number of entries per page has been increased (less white space). The ringbound volume contains about 4,300 accepted and grandfathered mineral species in bold-face type. The approximately 100 questionable mineral species are in regular type. The correct mineral name is given for about 1,100 chemical varieties, structural varieties, and synonyms. Mineral names are listed in alphabetical order in the ringbound volume, together with a chemical formula, crystal system(s), color, hardness, streak, cleavage, size, rarity, and chemical-crystallographic classification number.

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