Andradite
a mineral, calcium-iron garnet, ca 3 fe 2 si 3 o 2 , occurring in brown, green, or black crystals.
historical examples
andradite garnet furnishes brilliant green stones, which have been incorrectly named “olivines” by the trade.
a text-book of precious stones for jewelers and the gem-loving public frank bertram wade
the andradite garnets furnish the brilliant, nearly emerald green demantoids (so often called “olivine” by the trade).
a text-book of precious stones for jewelers and the gem-loving public frank bertram wade
noun
a yellow, green, or brownish-black garnet that consists of calcium iron silicate and is used as a gemstone. formula: ca3fe2(sio4)3
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