An Introduction to the Rock-Forming Minerals (known familiarly as DHZ, from the surnames of its authors[1]), is a reference book by William Alexander Deer, Robert Andrew Howie, and Jack Zussman often considered the "bible" of mineralogy.

[citation needed] It covers hundreds of minerals, with details of their structure, chemistry, optical and physical properties, distinguishing features, and paragenesis.

[2] It is intended as a reference book for undergraduate and postgraduate students.

Introduction to the Rock-forming Minerals is a condensed version of the multi-volume work Rock-forming Minerals by the same authors, which was published in 1962-3 with a second edition beginning in 1978, totalling 11 volumes.

The condensed version omits some references, etymology, and chemical analysis present in the larger work.