North Shore Sauna Rounded Sauna Stones give your heater the stone mass it needs for steady steam. Each order is 35 to 38 lb of hand-selected, smooth, rounded Olivine Gabbro, 2" to 4" in size, that heats evenly and holds its temperature.
Dense stone for steady steam
These high-density stones are chosen for heat retention. Once heated, they release a longer burst of steam when you ladle water over them, which helps you keep the heat and humidity where you want them for the whole session.
Durable and natural
The stones are made to handle sauna temperatures and resist cracking and shattering. They are natural stone with no added chemicals and do not give off fumes or odors when heated.
Olivine Gabbro from northern Minnesota
The stones come from a 1.1 billion year old vein of northern Minnesota bedrock. The smooth, rounded edges make them easy to arrange in your heater for even heat and steam.
Rounded or thermal
Our Thermal Sauna Stones are the same Olivine Gabbro in the same 35 to 38 lb order, and they also come in a larger 4" to 6" size for bigger stoves. Choose these rounded stones if you want smooth stones that stack neatly in a 2" to 4" size. Our sauna stones guide covers how to load and replace them.
Specifications
- Weight: 35 to 38 lb per order
- Stone size: 2" to 4"
- Stone type: Olivine Gabbro, rounded
- Natural stone, no added chemicals
- For wood-fired and electric sauna stoves, from tent stoves to large heaters
Related
Pair them with a tent wood stove, or browse sauna heaters and sauna accessories.

Why this sauna
- Dense Olivine Gabbro holds heat for steady steam.
- Smooth, rounded 2" to 4" stones stack evenly in the heater.
- Resists cracking and shattering at sauna temperatures.
- Natural stone with no added chemicals, fumes, or odors.
How it compares
| Rounded (this) | Thermal | |
|---|---|---|
| Stone | Olivine Gabbro, rounded | Olivine Gabbro |
| Sizes | 2" to 4" | 2" to 4" or 4" to 6" |
| Weight per order | 35 to 38 lb | 35 to 38 lb |