Harvia Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs
Harvia Rounded Olivine Diabase Sauna Stones | 33 lbs | 5–10 cm
Fill your sauna heater with Harvia R-991 rounded olivine diabase stones — 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.
- Authorized Retailer of Harvia
- Manufacturer Warranty Included
- Free Shipping to the Contiguous US
- Secure Checkout
- U.S.-Based Customer Support
Product Overview
Olivine 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.
The 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.
Harvia recommends replacing sauna stones every 1–2 years depending on frequency of use. Fresh stones maintain consistent heat output and reduce the risk of crumbling or uneven steam distribution.
Key Features
- Natural olivine diabase — dense, heat-resistant, long-lasting
- Rounded shape promotes even airflow and efficient heat transfer
- Compatible with electric and wood-burning sauna heaters
- Chemical-free, natural gray stone
- Ideal as a top stone layer in most residential heaters
- 33 lb (15 kg) per box — enough for most standard heater fills
Stone Placement Recommendations
- Stack stones loosely to allow airflow between them
- Follow your heater manufacturer’s stone placement guidelines
- Rounded stones are commonly used as the top stone layer
- Stone configuration may vary based on heater model and design
- Inspect stones annually and replace any that show cracking or crumbling
Specifications
| SKU | R-991 |
| Stone Type | Olivine diabase |
| Stone Shape | Rounded |
| Stone Size | 2–4 in (5–10 cm) |
| Color | Natural gray |
| Weight | 33 lb (15 kg) |
| Compatible Heaters | Electric and wood-burning sauna heaters |
What’s Included
- One 33 lb (15 kg) box of rounded olivine diabase sauna stones
Shipping & Delivery
This product includes free shipping within the contiguous United States. Ships via standard parcel service. Please inspect your shipment upon delivery and note any visible damage before signing.
About the Brand
Harvia 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.
Complete Your Wellness Setup
Pair these stones with a compatible Harvia heater and accessories for a complete sauna setup:
- Harvia The Wall SWS60 6kW Electric Sauna Heater — wall-mounted, 177–294 cu. ft.
- Harvia Decorative Rounded Sauna Stones, 5–10 cm — decorative top-layer option
- Harvia Steel Sauna Accessories Set SA006 — bucket, ladle & thermo-hygrometer
- Harvia Legend Sauna Bucket — black steel with thermo-aspen handle
Choose options
Harvia Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs Review Summary
What people like
Pros
- Excellent Heat Retention: The dense olivine diabase material holds heat effectively for a consistent sauna experience.
- Soft Steam Production: The rounded surface allows water to flow and evaporate in a way that creates a more gentle and pleasant steam.
- Attractive Aesthetic Design: The smooth, rounded appearance provides a high-end, professional look compared to traditional split stones.
- Heating Element Protection: The lack of sharp edges reduces the risk of damaging or scratching the delicate heating coils during installation and use.
Cons
- Higher Price Point: These rounded stones are generally more expensive than standard split olivine stones.
- Large Stone Size: At 5-10cm, they may be too bulky for smaller, compact electric heaters with tight spaces.
- Initial Dust Residue: Some users noted that the stones require thorough washing before the first use to remove stone dust.
- Slower Initial Heating: Because of their rounded shape and mass, they may take slightly longer to reach peak temperature compared to smaller, jagged rocks.
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