This guide helps the reader identify minerals quickly and easily, using the author's "Rapid Identification System" based on three measurable properties: the streak or inherent colour of a mineral; its Mohs' hardness, which can be determined using the "scratch test"; and its specific gravity or relative density. Colour-coded bars enable the reader to locate the possible matches. More than 500 mineral forms are presented with entries that include: name fracture; lustre; chemical formula; aggregates; and occurrence and localities.