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malachite has been used as an ornamental and gemstone
Ammonites were armoured cephalopods that died out around 66 million years ago
glass-clear crystals were known to the ancient Greeks as krystallos - hence the name crystal or more commonly rock crystal applied to this variety
Such a formation is extremely rare
Cut in Idar-Oberstein
SOLD | Versteinerte Holzplatte | Arizona, USA Brazil malachite has been used asOrigin: Arizona, USA Age: Triassic, 220 million years Size: H58cm W53cm D3cm Weight: 14 kg Description: Araucarioxylon arizonicum from the Triassic (approximately 220 million years ago), cut in cross section and polished to show the rich colors so well known from this locality, with the texture preserved at the edges. Additional Information: Petrified wood samples, fossils formed by the infiltration of minerals into the cavities between and within the