Name/Title
Garnet var. AlmandineEntry/Object ID
2014.1.28Description
About Garnet Group
Formula:X3Z2(SiO4)3X = Mg, Ca, Fe(II), Mn(II), etc.
Z = Al, Fe(III), Cr(III), V(III) etc.
Trace amounts of Sn may replace Fe(III).
Member of:Garnet Supergroup
Name: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.
The classical name for a group of silicate minerals with the same structure.
Not to be confused with the Garnet Supergroup which also includes garnet-type vanadates and others.
In traditional and petrological use the name 'garnet' usually refers to these six minerals:
Traditional garnet species
Mineral Formula
Almandine Fe2+3Al2(SiO4)3
Pyrope Mg3Al2(SiO4)3
Spessartine Mn2+3Al2(SiO4)3
Andradite Ca3Fe3+2(SiO4)3
Grossular Ca3Al2(SiO4)3
Uvarovite Ca3Cr2(SiO4)3Collection
RAGM Mineral CollectionAcquisition
Accession
2014.1Source or Donor
Crater Rock Museum (unknown donors)Acquisition Method
GiftDimensions
Height
3 inWidth
1 inLength
2-1/4 inLocation
Location
Display Case
FS-11Room
Frieda Smith HallBuilding
Crater Rock MuseumDate
July 25, 2023
