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These layers are an Eocene lagerstätte
especially those from the slate rocks of Southern Germany
Chessy in Frankreich
Beschreibung: Die hochästhetische Freiform eines "Tropfens"
The petrification process takes place underground when a tree is buried under sediment and can take millions of years
Amethyst Geode | Brasilien Crystals & Minerals These layers are an EoceneOrigin: Brazil Size: H47cm W31cm D18cm Weight: 28. 4kg Description: An amethyst geode with a hollow, concave shape, with bright purple colors. Additional information: Amethyst is a transparent, coarse grained variant of the mineral quartz that is valued for its purple color. Its physical properties are similar to those of quartz, but it contains more iron oxide than any other type of quartz, and experts believe its color comes from its iron content.