The classical name for a group of silicate minerals with the same structure. Not to be confused with the garnet structural group which on Mindat is defined as a larger group of minerals with the same type of crystal structure as that of the classical garnet minerals, but including minerals that are not silicates.
Named Carchedonius Garamanticus = Carthaginian or Garamantic Carbuncle in 77-79 by Pliny the Elder. Earlier named ΑνθραϪέ by Tyrtamus, commonly known by his honorary name, Theophrastus, possibly about 325-300 BCE, but seemingly a name also used for ruby spinel and red-pink sapphires. Named from granatum (a pomegranate) for its resemblance to seeds of this fruit.
X = Ca, Fe, etc. Z = Al, Cr, etc.
Recorded ages: Neoarchean to Neogene : 2640 ± 11 Ma to 5 Ma - based on 5 recorded ages
Traditional garnet species : Almandine Fe2+3Al2(SiO4)3, Pyrope Mg3Al2(SiO4)3, Spessartine Mn2+3Al2(SiO4)3, Andradite Ca3Fe3+2(SiO4)3, Grossular Ca3Al2(SiO4)3, and Uvarovite Ca3Cr2(SiO4)3