{"product_id":"harvia-sauna-rocks-black-vulcanite","title":"Harvia Sauna Rocks | Black Vulcanite","description":"\u003ch2\u003e\u003cspan\u003eHarvia Black Vulcanite sauna stones: striking looks, built to last\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eHarvia’s Black Vulcanite sauna rocks combine performance with striking looks. With volcanic origins dating back roughly 2 billion years, these stones have a fine, uniform grain that turns a deep, glossy black when splashed with water, adding a bold visual element to the heater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBeyond their appearance, Vulcanite rocks are exceptionally hard and durable, standing up well to the extreme heat and thermal cycling of sauna use. Their consistent granule size promotes even heat distribution across the heater, while their density helps them resist cracking and wear over time. Specifically selected to pair with a range of Harvia heaters, they’re a strong choice for anyone wanting both style and long-term reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e20kg box, stone size 10-15cm\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTurns a striking glossy black when wet\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eSourced from Western Finland’s subvolcanic rock deposits\u003c\/li\u003e\n\u003cli\u003eDense composition for excellent heat storage and retention\u003c\/li\u003e\n\u003cli\u003eWithstands repeated heating and cooling without breaking down\u003c\/li\u003e\n\u003cli\u003eProduces optimal steam for a genuine sauna experience\u003c\/li\u003e\n\u003cli\u003eCompatible with most sauna heater models\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNote: heavy item shipping rates apply for this item\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tasman Saunas","offers":[{"title":"Default Title","offer_id":55840726548553,"sku":null,"price":200.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0944\/0998\/2025\/files\/Untitled-1-24-07-202612-26-08.png?v=1784852876","url":"https:\/\/www.tasmansaunas.com\/products\/harvia-sauna-rocks-black-vulcanite","provider":"Tasman Saunas","version":"1.0","type":"link"}