The famous tin deposits in the mining district of Horní Slavkov - Krásno are bound to the igneous intrusions of the Karlovy Vary Granite Massif. During the last stages of magmatic intrusions, the accumulated volatile fluids converted slowly solidifying granite to the greisen, special type of metasomatic rock consisting of quartz, topaz, lithium-rich mica, and containing metals such as tin, tungsten, copper, arsenic and molybdenum. At the bottom of granite bodies, the feldspar rich metasomatites and alkali granites were formed. A prime example of this phenomenon is the locality Vysoký kámen (“High Stone”).
About 700 m northwest from the centre of the Mining Townlet Krásno is a small rock formation from which a wide view to the north and east open. The outcrop consisting of silicified greisen lies on the southern edge of the tin deposit Vysoký Kámen. The deposit was mined from the late 13th century, the biggest boom occurred in the sixteenth century. In the period 1972-1989, about 20,000 tons of ore were mined from the upper parts of the deposit. Reclaimed open pit lies on the northern slope of the hill.
Some 500 m further to the west is a large quarry in which the alkali-feldspar granite feldspar as raw material for the ceramic industry is mined. The greisen body is separated from the feldspar granite by important tectonic line called Fault of Vysoký Kámen (or of Horní Slavkov). The fault continues to the northwest across the foot of the Krudum Mountain, quartz wall in Sokolov, across the Sokolov Basin to the Oloví Ore District in the Krušné hory (Erzgebirge) Mts.