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![The quartz quarry in the mountainside above Kvalvikane](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ull_27.jpg?itok=zyI9-mbt)
Kvalvikane
In Ålvik quartz has long been used to produce ferro-silicon. The quartz was collected from the other side of the fjord, from the mountainside above Kvalvikane.
![From Helland toward the end of the valley with the Skrikjo waterfall.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ull_11.jpg?itok=aQL9hvnj)
![Hårteigen](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/ull_26.jpg?itok=3IkRLl38)
Hårteigen
Hårteigen, «the grey signpost», as the name suggests, is a landmark for mountain hikers on the western plateau. The piece of mountain is also a monument for the mighty rock layers that once covered the entire plateau.
![Sålesnes](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/jondal_20.jpg?itok=GdLshTb5)
Sålesnes
Jondal has one of the country’s oldest slate quarries. Roof tiles have been extracted here since the end of the 1700s, but the quarry is much older. Kvernurdi is mentioned in a diploma in 1421, when Bård Sigurdsson at Torsnes became the owner through a settlement. Already then it must have been customary to cut millstones here.
![From Måge](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/1/kvh_394-1.jpg?itok=hO2-z3lh)
Måge
Steatite is a type of stone that is abundant in Hardanger. There are large steatite deposits in the mountain below Folgefonna. These deposits are visible both in Krossdalen in Jondal, at Kveitno in Odda and at Måge in Ullensvang. There are many traces of steatite quarrying in Hardanger, and one of the largest fields is in the hillside above Måge.