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Dolomite (noun) is a type of limestone that consists of both calcium and magnesium. Chemically, it is written either as CaMg(Co3)2 or CaCO3.MgCO3. Dolomite is a natural ceramic material, so actual chemical composition can vary to a certain degree.

Dolomite is used as a high-temperature flux ( 2138 °F / 1170 °C) and can also act as a crystallization agent.

Dolomite is used as a flux in many studio-made glazes.
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