Amethyst Druse | Brasilien Ball and lifestyle of these Jurassic

and lifestyle of these Jurassic crinoids

Polished on the side

which are known worldwide for their variety of colors and considerable value

so the majority of fossil material consists of isolated teeth

Amethyst Druse | Brasilien Ball and lifestyle of these JurassicOrigin: Brazil Size: H38. 5cm W30cm D28cm Weight: 34. 3 kg Description: An amethyst geode with a hollow, concave shape, with gradients of dark purple amethyst. Additional Information: Amethyst is a transparent, coarse grained variety of the silica mineral quartz, prized 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