Bollingen Sandstone, also known as Kirchdorf Sandstone, is a coarse-grained and exceptionally durable natural stone with a distinctive appearance. Quarried in Bollingen village, which is part of the municipality of Rapperswil-Jona in the St. Gallen canton of Switzerland, this sandstone is highly regarded for its attractive silver-gray coloration and robust properties. Here's a detailed description:

Color Palette: Bollingen Sandstone is characterized by its dominant silver-gray base color. This elegant and versatile hue creates a timeless and refined aesthetic. The stone typically maintains a consistent color throughout its surface, contributing to its clean and classic appearance.

Texture and Grain: The coarse-grained texture of Bollingen Sandstone adds to its unique character. The larger grains provide a textured and tactile surface, making it suitable for various applications that require a more rugged and natural appearance. The stone's texture is robust and distinctive, making it a preferred choice for those seeking a stone with a bold presence.

Origin: Bollingen Sandstone is quarried in the village of Bollingen, which is situated in the municipality of Rapperswil-Jona in the St. Gallen canton of Switzerland. The geological processes specific to this region have contributed to the stone's unique coloration, texture, and durability.

Durability: This sandstone variety is renowned for its exceptional durability and strength. It is well-suited for both indoor and outdoor applications and can withstand the effects of weathering and natural wear and tear, ensuring its long-lasting performance.

Applications: Bollingen Sandstone's robust and distinctive qualities make it suitable for various architectural and design projects, including:

1. Exterior Cladding: It is commonly used to clad the exteriors of buildings, providing them with a rugged and natural aesthetic.
2. Flooring: Its durability and textured appearance make it an excellent choice for flooring in patios, walkways, and interior spaces where a more rustic look is desired.
3. Wall Features: The stone is used to create accent walls, feature walls, and fireplace surrounds, adding a touch of rugged elegance to interior designs.
4. Landscaping: Bollingen Sandstone is employed for landscaping projects, including garden paths, retaining walls, and decorative elements in outdoor spaces.
5. Architectural Details: It can be fashioned into architectural elements such as window sills, lintels, and columns, contributing to the overall design of structures.

Aesthetic Appeal: Bollingen Sandstone's coarse-grained texture and silver-gray coloration impart a sense of rugged elegance and natural beauty. Its bold presence and classic appearance make it a favored choice for those seeking a stone with character and durability.

In summary, Bollingen Sandstone, also known as Kirchdorf Sandstone, is a coarse-grained and silver-gray natural stone quarried in Bollingen village, Rapperswil-Jona, St. Gallen, Switzerland. Its durability, distinctive texture, and classic aesthetic make it a favored choice among architects, designers, and homeowners looking to incorporate a rugged and character-rich natural stone into their construction and design projects.

Mechanical characteristics
Bending strength: 6.00 N/mm2
Compressive strength: 38.00 to 109.00 N/mm2
Bulk density [ρ]: 2:40 to 2:50 kg/m3
hygric properties
Underwater Vol .: 6:00 to 7:00 vol.%