Agate is a Quartz silica mineral. It consists of successive layers of chalcedony, each of which has a different color. An incision into agate will reveal thin parallel curved lines of chalcedony. It took its name from the river in Sicily where it was first found. It took its name from the river in Sicily where it was first found. It is a very common mineral and is encountered in almost every color. It is usually opaque. In the Bible it is identified with the eighth tribe of Israel, the tribe of Levi. It is mined in Brazil, Uruguay, Germany, and Italy.
Pearls are lustrous and hard organic gems formed within mollusks, mainly in shells, around an original core, which can be either a parasite or a grain of sand. These foreign particles are then coated with layers of calcium carbonate. Pearls are thought to ward off negativism and clarify emotions. In the Apocalypse of John, pearls adorn the gates of the New Jerusalem.