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Technical Information of Solnhofen Natural Stone


Special Characteristics:
The rough surface carries numerous iron and manganese sediments called dendrites. They resemble fern.



All technical data listed on this page are considered as average values.  Deviation from the given norm is possible.


Colors yellowish (beige), grey, brownish, reddish
Surface Quarry rough, brushed (satinated), slightly honed, medium honed, fine honed, honed, matt polished, tumbled.
Thickness based on format: 7-12 mm, 13-25 mm or calibrated thickness depending on application.
Maintenance and care Instructions Water with wax free and non acidic detergents.
Water Absorption approx. 1.4% (according to mass)
Density approx. 2.58 g/m³
Abrasion Resistance according to DIN EN 14157 24.5 mm
Radioactivity Upon testing for radioactivity (gammaspectrometric measurement) performed by the LGA Nürnberg showed the following results in its measuring report for Solnhofen Natural Stone Slabs (M5921 104 A dated 16 April 2002): Values of K-40 with 19 Bq/kg to 15 Bq/kg (Calium 40), Ra-226 with <5.5 Bq/kg to <5.1 Bq/kg (radium 226), TH-232 with <0.4 Bq/kg to 2.1 Bq/kg (thorium 226) were significantly under those described in index 65 (BMU 1987 <37>) "natural radioactive matter in various materials."