magnesite


noun

  1. a mineral, magnesium carbonate, MgCO3, having a characteristic conchoidal fracture and usually occurring in white masses.

noun

  1. a white, colourless, or lightly tinted mineral consisting of naturally occurring magnesium carbonate in hexagonal crystalline form: a source of magnesium and also used in the manufacture of refractory bricks. Formula: MgCO 3

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