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Magnesium oxide (MgO) is a strategic critical mineral (SCM) that is ubiquitous in our society. MgO is essential for many industries that must protect their equipment from the effects of extremely high temperatures.

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Magnesium oxide also stands out for its health virtues, particularly in the pharmaceutical industry.

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Its most common form is that of a small white powder. On a microscopic scale, it consists of small crystals. MgO used by the refractory industry can also come in the form of briquettes (very small bricks).