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Emerald: The emerald deposit in the Leckbachrinne gully of Gamseck mountain in the Habach Valley (province of Salzburg), which was probably discovered in the Roman Era, was regarded as Europe's only deposit until recently. Emerald of high quality was rarely found at this site, but Austria supplied the European market for a long time. From an economic point of view, the extraction of emerald in the Habach Valley had little significance. During the 20th century, the emerald mine in Gamseck mountain, which was opened in 1860, was closed down due to unprofitability.