Definition of andradite in English:



mass noun
  • A mineral of the garnet group, containing calcium and iron. It occurs as yellow, green, brown, or black crystals, sometimes of gem quality.

    • ‘The crystals have a typical pseudo-octahedral habit, often with composite crystal faces, and are typically associated with red andradite, hematite, calcite, gaudefroyite, barite. kutnohorite, celestine, or even sturmanite.’
    • ‘The third major find in recent years is green andradite, some of which may be considered demantoid.’
    • ‘In the introduction to the garnet group, the various distinct species such as pyrope, almandite, grossularite, andradite, and spessartite are referred to as varieties.’
    • ‘The portion of the skarn where the rainbow garnets are found is essentially a coarse-grained aggregate of pure andradite.’
    • ‘The skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet (probably andradite or grossular), and pyrite.’


Mid 19th century: named after J. B. de Andrada e Silva ( c 1763–1838), Brazilian geologist, + -ite.