The Outcrop of Magnesite Ore Body is in Paekgumsan-dong, Tanchon City, South Hamgyong Province.
It is about 20 metres long, 5 metres wide and 15 metres high.
It is mainly composed of magnesite with small amounts of talc, leuchtenbergite, quartz, dolomite, tremolite, calcite, etc.
It is under preservation as a natural monument as it is of significance in studying the composition of minerals.