Cíge¾ - new field of chloropal and common opal

Abstract

In the open pits in surroudings of village Cígeľ in Prievidza district a new occurance of chloropal and common opal was found. The opal postvulkanic mineralization is related to the vulkanic komplex of the mountain range Vtáčnik. The locality is composed of vulcanic rock and their pyroklastic, represented by particularly by andesite and rhyolit brekcia. The quality of the opals is variable. The resouces of the opals were calculated on the order of hundrens ( XOO ) kg of available materials. Local opals have also another utilization mostly for the individual jewel.

Keywords

• chloropals
• vulkanic rock
• postvulkanic opal mineralization
• andesite
• rhyolit brekcia