Amethyst-Geode im Tischformat | Brasilien Plant goniatites have a chambered shell

goniatites have a chambered shell that is usually spirally wound in one plane and is made up of three layers

ist jedoch noch nicht geklärt

die er in der Sahara-Wüste verbracht hat

its aesthetic appeal has not diminished over time

in its greater hardness and higher specific gravity

Amethyst-Geode im Tischformat | Brasilien Plant goniatites have a chambered shellOrigin: Brazil Size: H12cm W27cm D12cm Description: Cut and polished on one side to reveal the bed of dark purple crystals. Additional Information: Amethyst is a transparent, coarse grained variant of the silicon mineral quartz, valued for its purple color. Its physical properties correspond to those of quartz, but it contains more iron oxide than any other variety of quartz, and experts believe its color is due to its iron content.