One of the mysteries of the English language finally explained.
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 skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet (probably andradite or grossular), and pyrite.’
- ‘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.’
Mid 19th century: named after J. B. de Andrada e Silva ( c 1763–1838), Brazilian geologist, + -ite.
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