Swedish Black Hägghult
This is known around the world and has been mined for over 100 years.
Finishes
About Hägghult
Black diabase has been quarried in Hägghult, west of Lönsboda in north-east Skåne province, since the late 19th century. The quarry has been in continuous operation ever since, and has had as many as 120 employees at times. Today, Hägghult is the world’s largest open-pit quarry for black diabase being almost one kilometre long, 50 metres wide and 75 metres deep. Hägghult is also home to the Black Mountains Work Museum, which shows how stonework has developed through the ages.
The black facade of Riksbanken, Sweden’s central bank, is made primarily of Swedish Black Hägghult.
About the material
Swedish Black Hägghult
| Technical properties | Standard | Unit | Value |
|---|---|---|---|
| Apparent density | EN 1936 | KG / M3 | 2980 | Water absorption | EN 13755 | WEIGHT % | <0,1 | Abrasion resistance, Böhme (based on thickness measurement) | DIN 52 108 | CM3 / 50 CM2 | 6,0 | Abrasion resistance, Böhme (based on weight measurement) | EN 14157 | MM3 | 5984 | Slip resistance, honed surface (dry) | EN 14231 | SRV | 49 | Slip resistance, honed surface (wet) | EN 14231 | SRV | 10 | Flexural strength | EN 12372 | MPa | 33,6 | Compressive strength | EN 1926 | MPa | 264 | Breaking load at dowel holes | EN 13364 | N | 3550 | Rupture energy, Thickness: 20 mm | EN 14158 | J | 3,0 | Petrographic composition | EN 12407 (only main components) | Plagioclase | % | 61 | Amphibole | % | 19 | Biotite | % | 10 | Chlorite, serpentine | % | 5 | Opaques | % | 4 |