Timeline Stories

All timeline stories.

03 máj: Status report of opal deposits

In 1789, Anton Ruprecht, professor of the Mining Academy in Banská Štiavnica, drew up a report on the status of opal deposits. The image of the existing mining area is still preserved in it, together with period instructions and plans. In his presence, the first experimental tunnel opened in the..Dozvedieť sa viac…

03 máj: Opal giant Harlequin

In 1775, the largest opal in the world was found at the bottom of the stream in Červenica, known as Harlequin. He weighed 607 grams and was rated 700,000 Dutch guilders. Today it is deposied in the collection of the Natural History Museum in Vienna.

03 máj: No interest in the mines

Until 1911, the State had been running the opal mines. Although there were efforts to sell them, the candidates withdrew from the contract as a result of the outbreak of the World War I.

03 máj: The oldest opal mines in the world

Anselmus de Boodt, personal physician of Emperor Rudolf II. and founder of modern mineralogy, describes in his work Gemmarum et Lapidum an old, overcast mine for precous opal, confirming the presence of mining in the Slánske vrchy mountains long before the first written mention of it.

03 máj: The only ones in the world

The search for magic opal was successful. This is evidenced by the order of Emperor Rudolf II, addressed to Stefan Kecer of Pekľany, ordering him to make his land accessible to the mining of precious stones. This written document confirms that the opal mine by Červenec is officially the oldest..Dozvedieť sa viac…