07315 - Extremely Beautiful 3.78 Inch Brazilian Agate Slice (Chalcedony Geode Section) Psammechinus Beautiful proetid trilobite from the

Beautiful proetid trilobite from the lower devonian of the outcrops of Foum Zguid (Morocco)

(2012) A skull fragment of the mosasaurid Prognathodon cf

Rare specimen from an early evolutionary stage of the modern whale

Until 2011

07315 - Extremely Beautiful 3.78 Inch Brazilian Agate Slice (Chalcedony Geode Section) Psammechinus Beautiful proetid trilobite from theAgate is a rock consisting primarily of cryptocrystalline silica, chiefly chalcedony, alternating with microgranular quartz. It is characterized by its fineness of grain and variety of color. Although agates may be found in various kinds of host rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks. This beautiful large polished agate slices comes from southern Brazil. The stone has been soaked in a