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Siderite
siderite , n. (L. sideritisloadstone, Gr. ????, ????, of iron, from ????
iron.) 1. (Min.) (a)
Carbonate of iron, an important ore of iron occuring generally in
cleavable masses, but also in rhombohedral crystals. It is of a light
yellowish brown color. Called also sparry iron, spathic
iron. (b) A meteorite consisting solely
of metallic iron. (c) An indigo-blue
variety of quartz. (d) Formerly, magnetic
iron ore, or loadstone.
2. (Bot.) Any plant of the genus
Sideritis; ironwort.
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