2.   Dubnik opal mines  History  Harlequin  Something special  Video  Resources Content

3.   Mines are located 35 km from Košice between villages Červenica and Zlatá baňa  These opal mines are the oldest and largest opal mines in the world  In the Prešov we have exhibition of opals and they are also inserted into the clock  Slovak precious opal especially liked the family members of the Emperor Napoleon  One more unique Dubnik Opal Mines

5.   11-12 (Roman times)  30 tunnels with a total length of over 22 km  Slovak opal mines were dragging a single location in the world History

7.   discovered in 1775  Červenica  Its dimensions are honorable  Clear, rainbow  Maticovy opal  Stone enjoyment of life Harlequin

8.   Pie harlequin

10.   Currently, the flooded portion of the mine is Viliam  You can dive here with the experts and look at things which normally human won´t see  Altitude 594 m  Water temperature 5 C all year round  PH of water from 2.8 to 3.0 (acid!)  Visibility theoretical 100 m Something special

12.  Video https://www.youtube.com/watch?v=gFSsnX5wog4

13.   http://www.presov.sk/portal/?c=12&id=3140 http://www.presov.sk/portal/?c=12&id=3140  http://www.opalovebane.sk/index.php?page=20&ja zyk=1 http://www.opalovebane.sk/index.php?page=20&ja zyk=1  http://sk.wikipedia.org/wiki/Op%C3%A1lov%C3% A9_bane_Dubn%C3%ADk http://sk.wikipedia.org/wiki/Op%C3%A1lov%C3% A9_bane_Dubn%C3%ADk  http://www.harry5.estranky.sk/clanky/slovenske- lokality.html http://www.harry5.estranky.sk/clanky/slovenske- lokality.html  https://www.youtube.com/watch?v=gFSsnX5wog4 https://www.youtube.com/watch?v=gFSsnX5wog4 Resources

14.  Thank you for your attention Renáta Gdovinová Simona Tereková II.D