Sauna Stones, Rounded Olivine, 10-15cm, 44lbs Cozy Heat Premium Rounded Olivine Diabase sauna heater stones resemble nature's rounded stones from the great rapids, bringing an organic look to your sauna and multiple benefits. This stone introduces a soft steam method; the pouring water runs easily down to the lower stone layers, so the water reaches more surface area, generating more steam. Only available with the purchase of a Cozy sauna stove. Elegant rounded sauna heater stones made of olivine diabase Selected, clean and safe to use.