{"product_id":"harvia-sauna-heater-stones-rounded-olivine-5-10cm-33lbs","title":"Harvia Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs","description":"\u003cdiv style=\"max-width: 1200px; margin: 0 auto; font-family: Arial, sans-serif; color: #222; line-height: 1.6;\"\u003e\n\u003ch1 style=\"font-size: 26px; margin-bottom: 10px;\"\u003eHarvia Rounded Olivine Diabase Sauna Stones | 33 lbs | 5–10 cm\u003c\/h1\u003e\n\u003cp style=\"font-size: 15px; margin-bottom: 18px;\"\u003eFill your sauna heater with \u003cstrong\u003eHarvia R-991 rounded olivine diabase stones\u003c\/strong\u003e — natural, chemical-free stones sized 5–10 cm (2–4 in) and packaged in a convenient 33 lb (15 kg) box. Their rounded shape promotes even airflow and efficient heat transfer, delivering the steady, enveloping warmth that defines a great sauna session. Compatible with electric and wood-burning sauna heaters.\u003c\/p\u003e\n\u003cdiv style=\"margin: 12px 0 18px 0; padding: 14px 16px; border: 1px solid #d9d9d9; border-radius: 8px; background: #f8f8f8; font-size: 15px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 8px; font-size: 15px;\"\u003eShop with Confidence\u003c\/strong\u003e\n\u003cul style=\"margin: 0; padding-left: 18px;\"\u003e\n\u003cli\u003eAuthorized Retailer of Harvia\u003c\/li\u003e\n\u003cli\u003eManufacturer Warranty Included\u003c\/li\u003e\n\u003cli\u003eFree Shipping to the Contiguous US\u003c\/li\u003e\n\u003cli\u003eSecure Checkout\u003c\/li\u003e\n\u003cli\u003eU.S.-Based Customer Support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdetails style=\"margin-bottom: 12px;\" open=\"\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eProduct Overview\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eOlivine diabase is one of the most trusted stone types for sauna use — dense, heat-resistant, and slow to crack under repeated thermal cycling. Harvia’s rounded olivine stones are sourced and shaped to sit naturally in your heater’s stone compartment, allowing water to flow through evenly when you ladle water for löyly.\u003c\/p\u003e\n\u003cp\u003eThe 5–10 cm size range makes these stones ideal as a top layer in most residential electric and wood-burning heaters. Stack them loosely following your heater manufacturer’s guidelines to maximize airflow and heat output.\u003c\/p\u003e\n\u003cp\u003eHarvia recommends replacing sauna stones every \u003cstrong\u003e1–2 years\u003c\/strong\u003e depending on frequency of use. Fresh stones maintain consistent heat output and reduce the risk of crumbling or uneven steam distribution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eKey Features\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0;\"\u003e\n\u003cli\u003eNatural olivine diabase — dense, heat-resistant, long-lasting\u003c\/li\u003e\n\u003cli\u003eRounded shape promotes even airflow and efficient heat transfer\u003c\/li\u003e\n\u003cli\u003eCompatible with electric and wood-burning sauna heaters\u003c\/li\u003e\n\u003cli\u003eChemical-free, natural gray stone\u003c\/li\u003e\n\u003cli\u003eIdeal as a top stone layer in most residential heaters\u003c\/li\u003e\n\u003cli\u003e33 lb (15 kg) per box — enough for most standard heater fills\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eStone Placement Recommendations\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0;\"\u003e\n\u003cli\u003eStack stones loosely to allow airflow between them\u003c\/li\u003e\n\u003cli\u003eFollow your heater manufacturer’s stone placement guidelines\u003c\/li\u003e\n\u003cli\u003eRounded stones are commonly used as the top stone layer\u003c\/li\u003e\n\u003cli\u003eStone configuration may vary based on heater model and design\u003c\/li\u003e\n\u003cli\u003eInspect stones annually and replace any that show cracking or crumbling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eSpecifications\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eR-991\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eStone Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eOlivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eStone Shape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eRounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eStone Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e2–4 in (5–10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eNatural gray\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e33 lb (15 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003e\u003cstrong\u003eCompatible Heaters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 10px;\"\u003eElectric and wood-burning sauna heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eWhat’s Included\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0;\"\u003e\n\u003cli\u003eOne 33 lb (15 kg) box of rounded olivine diabase sauna stones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eShipping \u0026amp; Delivery\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eThis product includes \u003cstrong\u003efree shipping within the contiguous United States\u003c\/strong\u003e. Ships via standard parcel service. Please inspect your shipment upon delivery and note any visible damage before signing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eAbout the Brand\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003eHarvia is one of the world’s leading sauna and spa companies, founded in Finland in 1950. Known for their engineering precision and Scandinavian design philosophy, Harvia products are trusted by homeowners and professionals worldwide. Every product is designed and manufactured to meet the highest standards of safety, performance, and durability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 12px;\" open=\"\"\u003e\n\u003csummary style=\"font-weight: bold; font-size: 17px; cursor: pointer;\"\u003eComplete Your Wellness Setup\u003c\/summary\u003e\n\u003cdiv style=\"padding-top: 12px; font-size: 15px;\"\u003e\n\u003cp\u003ePair these stones with a compatible Harvia heater and accessories for a complete sauna setup:\u003c\/p\u003e\n\u003cul style=\"padding-left: 20px; margin-top: 0;\"\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener noreferrer\" href=\"\/products\/harvia-the-wall-sws60-electric-sauna-heater-stainless-steel\" target=\"_blank\"\u003eHarvia The Wall SWS60 6kW Electric Sauna Heater\u003c\/a\u003e — wall-mounted, 177–294 cu. ft.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener noreferrer\" href=\"\/products\/harvia-sauna-heater-decorative-stones-rounded-5-10cm\" target=\"_blank\"\u003eHarvia Decorative Rounded Sauna Stones, 5–10 cm\u003c\/a\u003e — decorative top-layer option\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener noreferrer\" href=\"\/products\/harvia-steel-sauna-accessories-set-sa006-bucket-ladle-thermo-hygrometer-stainless-steel\" target=\"_blank\"\u003eHarvia Steel Sauna Accessories Set SA006\u003c\/a\u003e — bucket, ladle \u0026amp; thermo-hygrometer\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener noreferrer\" href=\"\/products\/harvia-legend-sauna-bucket-black-steel-thermo-aspen-handle\" target=\"_blank\"\u003eHarvia Legend Sauna Bucket\u003c\/a\u003e — black steel with thermo-aspen handle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":41162884415546,"sku":"R-991","price":102.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/9840\/7738\/files\/Harvia-Sauna-Stones-R-991_png.jpg?v=1778098469","url":"https:\/\/primeregeneration.com\/products\/harvia-sauna-heater-stones-rounded-olivine-5-10cm-33lbs","provider":"Prime Regeneration","version":"1.0","type":"link"}