Garnet (name) given name for American girls. It was in occasional use for boys in the United States between 1882 and 1925. It was most popular in 1904, when it was 593rd most popular name for American boys. The name has not appeared among the top 1,000 names for boys or girls since 1944 in the United States. 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
Garnet rocks in which they grew. Garnet grains that lack compositional zonation commonly are interpreted as having been homogenized by diffusion, and the inferred homogenization also has implications for the temperature-time history of the host rock. Garnets are also useful in defining metamorphic facies of rocks. For instance, eclogite can be defined as a rock of basalt composition, but mainly consisting of garnet and omphacite. Pyrope-rich garnet is restricted to relatively high-pressure metamorphic rocks, such as those in the lower crust and in the Earth's mantle. Peridotite may contain plagioclase, or aluminium-rich spinel, or pyrope-rich garnet, and the presence of each