garnet(redirected from Garnet structure)
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1. Any of several common, widespread aluminum or calcium silicate minerals occurring in two internally isomorphic series, (Mg, Mn, Fe)3Al2Si3O12 and Ca3(Cr, Al, Fe)2Si3O12, generally crystallized, often embedded in igneous and metamorphic rocks, and colored red, brown, black, green, yellow, or white and used both as gemstones and as abrasives.
2. A dark to very dark red.
[Middle English, from Old French grenate, from grenat, pomegranate-red, probably from Latin grānātum, pomegranate, from neuter of grānātus, seedy; see pomegranate.]
(Minerals) any of a group of hard glassy red, yellow, or green minerals consisting of the silicates of calcium, iron, manganese, chromium, magnesium, and aluminium in cubic crystalline form: used as a gemstone and abrasive. Formula: A3B2(SiO4)3 where A is a divalent metal and B is a trivalent metal
[C13: from Old French grenat, from grenat (adj) red, from pome grenate pomegranate]
(Nautical Terms) nautical a tackle used for lifting cargo
[C15: probably from Middle Dutch garnaat]
1. any of a group of hard deep red, brownish, or green vitreous minerals, silicates of calcium, magnesium, iron, or manganese with aluminum or iron: several varieties are used as gems.
2. a deep red color.
[1275–1325; < Old French gernate, grenade < Latin grānātum granular; compare pomegranate]
Any of several common red, brown, black, green, or yellow minerals consisting of aluminum or calcium silicate. Garnets occur in igneous, metamorphic, and sedimentary rocks, and are used as gemstones and industrial abrasives.
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|Noun||1.||garnet - any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive|
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
andradite - a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone
carbuncle - deep-red cabochon garnet cut without facets
pyrope - a deep red garnet used as a gemstone
rhodolite - a red or pink variety of garnet used as a gemstone
transparent gem - a gemstone having the property of transmitting light without serious diffusion