Garnet (name) Garnet (name) Garnet is a name of Middle English origin, derived from the dark red gemstone, which was in turn named for the pomegranate that the garnet crystals resemble. The surname Garnett comes from an Old English occupational surname referring to a seller of hinges. It is both a surname and a given name. The name came into occasional use along with other gem names during the late Victorian era. Garnet was among the top 1,000 names for girls in the United States between 1884 and 1944. It was most popular in 1911, when it was the 376th most popular
Garnet of the three minerals defines a pressure-temperature range in which the mineral could equilibrate with olivine plus pyroxene: the three are listed in order of increasing pressure for stability of the peridotite mineral assemblage. Hence, garnet peridotite must have been formed at great depth in the earth. Xenoliths of garnet peridotite have been carried up from depths of and greater by kimberlite, and garnets from such disaggegated xenoliths are used as a kimberlite indicator minerals in diamond prospecting. At depths of about and greater, a pyroxene component is dissolved in garnet, by the substitution of (Mg,Fe) plus Si for 2Al