They look like precious stones embedded in the rock, so the satellite picture shows a place that caught my attention and which I personally decided to explore.

There are two colourful geomorphological forms near the Sulejow’s Lagoon and the Pilica River. It turned out that it was a work of man and the reamins of an old qartz sand mine. Old excavations were flooded with water and their color shade depends on the depth of the resulting water pool.

The mine is also interesting because it has its own history. Quartz sand began to be mined here as early as the 18th century, and in 1922 it was here in Biala Gora (White Mountain) that the first industrial-scale open-cast mine with a glass-sand processing plant was launched in Poland. This depostid is considered to be the largest in Europe and accounts for 80% of domestic quartz resources. The extracted sand contains 98% pure quartz. Tomaszowskie Kopalnie Surowcow Minaralnych “Biala Gora” Sp. z o.o. belong the German group Quarzwerke GmbH. (Brux)

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