Magnesite (MgCO3)

Magnesite; The formula is MgCO3 which is theoretically a mineral with 52.3% CO2, 47.7% MgO and very little Fe20E in the composition, hardness 3.4 - 4.5, specific gravity 3.9 - 3.1.

The color varies between white and yellow or gray and brown.

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