Geode interior Thin slice of a geode showing the layers of silica surrounding the central hollow A second geode slice lies behind the first A geode forms when layers of the mineral silica silicon dioxide precipitate from liquid onto the inside of hollows in rock Mineral impurities form the colours seen The opaque silica is amorphous non crystalline silica named chalcedony The colours can form bands brown or delicate branching tree like structures green
Curious to try something new? Why not learn the language of colors? Our collection of abstract art will introduce you to intriguing concepts and emotions evoked by brushstrokes, shapes, and composition of art. A genre of modernism, abstract art, was founded by Wassily Kadinsky. It represents objects and ideas in an interpretive way.
Other famous abstract artists include Piet Mondrian, Joan Miro, and Jackson Pollock. See their work come alive with the painterly quality of our museum-grade canvas.