Swedish Gneiss Bårarp
The beautiful marbled gneiss from Bårarp in Halland province, with shades of red, blue and black, varies in colour and structure depending on what part of the quarry it comes from. This makes every stone block unique. The stone comes in two varieties: Swedish Gneiss Bårarp Premium with its distinct marbling, and Swedish Gneiss Bårarp with somewhat more subdued features.
Bårarp is situated north of Halmstad in Halland province, and is Sweden’s biggest open-pit quarry for ornamental stone. The material we quarry here is gneiss, which is characterised by a beautifully marbled colour variation. Bårarp has been operating since 1980 and comprises four stone quarries around the same outcrop. This means that the stone differs in structure depending on which of the four it comes from. Moreover, the gneiss from Bårarp has been classed as a Global Heritage Stone Resource by the International Union of Geological Sciences (IUGS), in association with UNESCO World Heritage and others. The unique feature of Bårarp gneiss is that the magma which pushed its way up to the earth’s crust when the rock was being formed was heated twice, thus giving the stone its characteristic colour variation. Many old Hanseatic cities in Germany have streets paved with gneiss stones from nearby Bårarp, and it can also be found in churches from as long ago as the 12th century.
Swedish Gneiss Bårarp is a very popular stone with a wide range of applications. The material’s variation can be seen clearly in slabs, for instance on streets and squares in central Linköping.
About the material
Swedish Gneiss Bårarp polished
|Fire technology properties||96/603/EC||Without testing||NPD||Apparent density||EN 1936||KG / M3||2690||Water absorption||EN 13755||WEIGHT %||0,1||Abrasion resistance, Böhme (based on weight measurement)||EN 14157||MM3||5905||Slip resistance, honed surface (dry)||EN 14231||SRV||55||Slip resistance, honed surface (wet)||EN 14231||SRV||25||Flexural strength||EN 12372||MPa||19,0, average 20,7, |
standard deviation 0,8
|Compressive strength||EN 1926||MPa||210, average 242, |
standard deviation 15
|Breaking load at dowel holes||EN 13364||N||3201, average 3454, |
standard deviation 123,58
|Fracture energy||EN 14158||J||5||Petrographic composition||EN 12407 (only main components)||Quartz||%||45||Plagioclase||%||40||Potassium feldspar||%||4||Biotite||%||4|