Volume 67 of Reviews in Mineralogy and Geochemistry covers the Crystal Chemistry, Occurrence, and Health Issues of Amphiboles. Contents: Amphiboles: Crystal ChemistryClassification of the AmphibolesNew Amphibole Compositions: Natural and SyntheticLong-Range Order in AmphibolesShort-Range Order in AmphibolesNon-Ambient in situ Studies of AmphibolesThe Synthesis and Stability of Some End-Member AmphibolesThe Significance of the Reaction Path in Synthesizing Single-Phase Amphibole of Defined CompositionAmphiboles in the Igneous EnvironmentMetamorphic Amphiboles: Composition and CoexistenceTrace-Element Partitioning Between Amphibole and Silicate MeltAmphiboles: Environmental and Health ConcernsAmphiboles: Historical Perspectiv