Mokrá quarry, Mokrá, Čichalov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
4mm Gibbsite crystal.Collection J.Svejkovský, photo Petr Fuchs
© Petr Fuchs
5mm Gibbsite crystal. Collection J.Svejkovský, photo Petr Fuchs
Nice transparent yellowish crystal of gibbsite up to 4mm on crystals of phillipsite
© BB
Spherical aggregates composed of gibbsite crystals coated with blue-gray chlorite setting on phillipsite crystals.
Nice hemisphere of second generation of gibbsite on philipsite.
Hemispheres of second generation of gibbsite, on the top is white calcite. Length of scale line is 3 mm.
© Jakub Jirásek, 2005
Druse of white zeolites (PXRD analysed, mixture of gonnardite and thomsonite) on nephelinite matrix. Size 4×3 cm. Collection of author.
© Jakub Jirásek, 2010
nice nordstrandite group. Collection J.Svejkovský, photo Petr Fuchs
Druse of white zeolites (PXRD analysed, mixture of phillipsite, thomsonite and gonnardite) on nephelinite matrix. Size 12×11 cm. Collection of author.
© Jakub Jirásek, 2013
Collection J.Svejkovský, photo Petr Fuchs
Nordstrandite group. Collection J.Svejkovský, photo Petr Fuchs
Gibbsite agregate, Collection J.Svejkovský, photo Petr Fuchs
Mineralized fissure in the middle of second floor containing mixture of zeolites (prevailing gonnardite and thomsonite proved by PXRD). Shame that they weather fast if not collected.
© Jakub Jirásek, 2019
Nice orange-brown aggregates of nordstrandite with white aggregate of gonnardite on phillipsite.
Nice crystalline balls of nordstrandite on aggregates of gibbsite
Two types aggregates of phillipsite
Crystalline ball of nordstrandite on white aggregates of phillipsite.
Whittish aggregates of gonnardite on brownish agregates of gibbsite with phillipsite.
Rare pink crystals of nordstrandite on whittish aggregates of phillipsite
Very rare pink crystals of nordstrandite on aggregates of phillipsite
Rare pink crystals of nordstrandite on clear crystalline aggregates of phillipsite
Small group of clear lenticular calcite crystals attached to a crystalline phillipsite aggregate
Rare spherical greenish crystalline aggregates of siderite with calcite. Minerals was confirmed by EMPA-WDS
Gray-green nordstrandite crystal aggregates with drusy phillipsite and clear calcite.
© 2022 Harold Moritz
Blocky aggregates of gonnardite (mostly broken open with white interiors) on druse of phillipsite lining a vesicle in matrix.
© 2023 Harold Moritz
Cross-sections of gibbsite crystal aggregates fluorescing cyanish-white under MW UV light. Response is similar under SW UV, weak under LW. White gonnardite crystals encrusting the gibbsite are reflecting the visible purple light getting through the UV filter, not fluorescing.
© 2024 Harold Moritz
Cross-sections of light brown gibbsite crystal aggregates with white gonnardite crystals encrusting the gibbsite. A layer of translucent, pale gray, waxy phillipsite lines the edge of the nephilinite matrix.
White gonnardite crystals encrusting a light brown gibbsite crystal aggregate both an a layer of translucent, drusy, pale gray phillipsite lining the void in nephelinite.
Mokrá quarry.
© Jakub Jirásek, 2006
Panoramic view of the Mokrá Quarry from the southern part of the lowest level to the north.