Amethyst Geode Paar mit Calcit | Brasilien Masterpieces or—as is the case for

or—as is the case for most ancient sandstones—filled with a chemical cement of silica or calcium carbonate

if it occurs with a clay mixture

about 180 million years

glasklare Kristalle waren den alten Griechen als krystallos bekannt – daher der Name Kristall oder gebräuchlicher Bergkristall

Diese Art lebte während der Maastricht-Stufe der späten Kreidezeit

Amethyst Geode Paar mit Calcit | Brasilien Masterpieces or—as is the case forOrigin: Brazil Size: H161cm W33cm D26cm Net weight: 252Kg Description: Two stunning amethyst geodes with hollow concave shapes. Very rare bright purple color and unusual white calcite crystal formation. Additional Information: Amethyst, a variety of the silicate mineral quartz, valued as a semi precious stone because of its purple color. Its physical properties are those of quartz, but it contains more iron oxide than any other variety of quartz.