20248 - Extremely Beautiful 7.87 Inch Brazilian Agate Slice (Chalcedony Geode Section) Orthoclase (Feldspar) Calcite is a carbonate mineral

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3)

This is a small rarity coming from the Paleocene phosphate quarries of the sedimentarian basin of Oulad Abdoun (Morocco)

Prospectatrix

Pterosaurs and Plesiosaurs

It is related to the modern Tarpon

20248 - Extremely Beautiful 7.87 Inch Brazilian Agate Slice (Chalcedony Geode Section) Orthoclase (Feldspar) Calcite is a carbonate mineralAgate 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