title: Hey's Mineral Index
text: # Hey's Mineral Index
  
  Hey's Mineral Index is a standard reference work in mineralogy.
  
  It is an alphabetical index of known mineral species and varieties, and includes synonyms. For species and major varieties more detail is provided. It includes a classification of minerals based on their chemistry into 32 top-level groups, and breaks these groups down further.
  
  ## Editions
  
  * First edition, An Index of Mineral Species & Varieties Arranged Chemically, With An Alphabetical Index of Accepted Mineral Names and Synonyms by Max Hutchinson Hey, published by order of the British Library, was published in 1950.
  * Second edition by Max Hutchinson Hey was published in 1962.
  * Third edition by Andrew M. Clark was published in 1993.
  * Fourth edition by Andrew M. Clark due for publication in 2004 but was never released.
  