Olivine rock

Olivine rock is the ultimate material for a heat-retaining fireplace

Material for the body of Uunisepät’s fireplaces is quarried from Finnish bedrock. The olivine rock is crushed and cast into elements.

Mäntyharju olivine rock is a pure natural product that is perfectly suited for use in products exposed to high temperatures and repeated temperature variations. It stores heat more efficiently than most fireplace materials, and releases it evenly for several hours. Olivine rock does not erode or release radon.

Mäntyharju olivine is the densest rock material known in Finland. It has a specific weight of roughly 3,300 kg/m³.

Our fireplaces are tested in our own state-of-the-art laboratory in co-operation with VTT, the Technical Research Centre of Finland Ltd.


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