The hydroquartzite mine on Király Hill, which rises above Sárospatak, was a millstone mine known throughout Europe in the second half of the 19th century. The rocks of Király-hegy are heavily fermented, Miocene-aged Megyer-hegyi rhyolite orphan, but the ridge of the mountain is several meters thick hydroquartz, which was the raw material of high-quality millstones. Once this was primarily produced, the remaining mining yard was quite zigzagged. Minerals are primarily associated with hydrocartzite winters. The quarry has long been abandoned, reclaimed by nature, so good finds are becoming rarer. On the side of the mountain - however, due to the continuous viticulture - to this day, a good number of minerals from the mountain can be collected from the surface, especially the famous white opal.
The King's Mountain mine is the so-called The highest point of the millstone educational trail. It can be reached from Makkoshotyka, at the Szilvás-kút Tourist House, by the red T-marked educational trail, or from Sárospatak, by parking at the Bot-kő car park and also using the red T-marked educational trail. From both sides approx. You have to walk 3 km. For those who would be too diligent on this trip, stop their car along the road connecting Makkoshotyka with Sárospatak and walk up to the vineyards, where you will find the same as above. The view is definitely royal!