Posted 7 years ago
Silverpendant from Dalarna Sweden with engraving and bergslagsstone. The pendant was made in 1973 by Gustaf Asp, Ateleje Ädelsmide, Hedemora.
Bergslagsstone is also called slag stone and is a waste product from iron production in the 1700 - and 1800's . Rock Slag stone formed when the oven is sufficiently high temperature to vitrify the ore.
The most beautiful rock mining produces crafters use for jewelry. Bergslagsstone slag is formed during the metal smelting . The slag floats on top of the melt and dropped out of the furnace before the metal. The slag is available in all sorts of colors and textures . What distinguishes Bergslagsstone is right color and consistency. The color can vary from light blue over bright blue and dark blue through green to black. The appearance is partly due to what it contains of minerals. The structure is glassy and brittle.
Around the Bergslagen area bricked houses of slag stone , and many buildings are still standing today , such as the ruin of " Slag Stone Castle " from 1884 at Norhyttan in southern Dalarna . Today bricked houses no longer are made with slag stone, but the color stone , especially the blue , is often used for jewelry.
I enclose some photos of this stone, showing how it´s been used as decoration in an old garden and as building material in an old cellar.