Black vulcanite sauna heater stone is a small granular, dark grey stone. When wet, the stone shines black making it a great-looking option with selected Harvia heaters. The stone’s volcanic origins date back to ca. 2000 million years. Based on its structure and composition, vulcanite is a good choice for a sauna stone as it is hard and durable.

• Stylish vulcanite sauna heater stone. Shines black when wet.
  
• For electric heaters and as a top stone for wood burning heaters
  
• Split-face stones store plenty of heat, making the water thrown onto them vaporise efficiently on the broad fracture surface
  
• The split-face stones are easy to stack and enable good air circulation
  
• Excellent resistance to heat fluctuations and thermal conductivity. Good stone gravity and heat storage capacity.
  
• Color and stone species: Dark grey vulcanite
  
• Stone size 5-10 cm and box weight 20 kg
  
• Does not contain harmful ingredients
  
• Check the right stone size for your heater from the heater manual
  

It is recommended that all stones should be rinsed to remove any stains or dust that can cause unpleasant odor during the first few times of using the heater.