(redirected from Andradite garnet)
Also found in: Thesaurus, Encyclopedia.


A green to brown or black calcium-iron garnet, Ca3Fe2(SiO4)3.

[After José Bonifácio de Andrada e Silva.]


(Minerals) a yellow, green, or brownish-black garnet that consists of calcium iron silicate and is used as a gemstone. Formula: Ca3Fe2(SiO4)3
[C19: named after J. B. d'Andrada e Silva (1763–1838), Brazilian mineralogist; see -ite1]


(ˈæn drəˌdaɪt)

a garnet occurring in brown, green, or black crystals.
[1830–40; after J. B. de Andrada e Silva; see -ite1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.andradite - a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone
garnet - any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive
demantoid - a green andradite used as a gemstone
References in periodicals archive ?
A new deposit of andradite garnet of the demantoid and topazolite varieties has recently been discovered in Antetezambato, Ambanja area, Antsiranana province, North Madagascar.
Demantoid garnet is a rare and beautiful bright grass green sub-variety of andradite garnet.