Chapter titles: Structure and chemistry of zircon and zircon-group minerals; The composition of zircon and igneous and metamorphic petrogenesis; Melt inclusions in zircon; Zircon saturation thermometry; Diffusion in zircon; Historical development of zircon geochronology; Zircon U-Th-Pb geochronology by ID-TIMS; Considerations in zircon geochronology by SIMS; Present trends and the future of zircon in geochronology: laser ablation ICPMS; Detrital zircon analysis of the sedimentary record; High-precision U-Pb zircon geochronology and the stratigraphic record; Lu-Hf and Sm-Nd isotope systems in zircon; Oxygen isotopes in zircon; Radiation effects in zircon; Spectroscopic methods applied to zircon; Atlas of zircon textures.