{"id":2751,"date":"2026-01-07T19:25:04","date_gmt":"2026-01-07T18:25:04","guid":{"rendered":"https:\/\/www.regionsaris.sk\/?post_type=prirodne-krasy&p=2751"},"modified":"2026-02-11T11:01:16","modified_gmt":"2026-02-11T10:01:16","slug":"slovenske-opalove-bane","status":"publish","type":"prirodne-krasy","link":"https:\/\/www.regionsaris.sk\/en\/prirodne-krasy\/slovenske-opalove-bane\/","title":{"rendered":"Slovak opal mines"},"content":{"rendered":"

World unique hidden in the Slansk\u00e9 hills<\/h2>\nBetween Pre\u0161ov and Ko\u0161ice there is a mountain of volcanic origin. Slansk\u00e9 vrchy in its heart hide a world unique, the largest and oldest opal mines in the world<\/strong>. Dubn\u00edck\u00e9 mines are historically and culturally significant site, whose history dates back to the times before our era. The precious opal from Dubn\u00edk enchanted many a ruler, alchemist or poet. Until the end of the 19th century it was the only open deposit of precious opal in the world.\n

Rich underground<\/h3>\nSlovak opal is a certified geographical designation of precious opal, which comes from deposits in the Slansk\u00e9 vrchy Mountains in Eastern Slovakia. For centuries, Slovak precious opals have been distinguished by their intense play of colours, the so-called opalescence, and they are highly valued worldwide for their unique properties. The underground of the mines consists of an intricate network of tunnels over 35 kilometres in length.<\/strong> The mining of precious opal in Dubn\u00edk took place until 1922. In the underground mines you will discover the history of precious opal from Dubn\u00edk with your own senses, you will get to know how the opal originated, how it was mined, processed and how jewellery made of precious opal adorned the necklines and heads of the world's monarchs. A visit to the opal mines is also an excellent tip for a school trip.\n

Did you know:<\/strong><\/h3>\n