Peridot is the gem variety of olivine. It has a hardness of 6.5 – 7 and a specific gravity of 3.8. Its name is probably derived from the Persian word “pharidat”, which means gemstone.
The peridot was known since ancient times. The Romans knew and used the peridot, which they called “evening emerald”. It is one of the few gems that appear consistently with a single color. The greater the iron content the more intense its pigmentation.
The largest amount of peridot is mined in Arizona U.S.A
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 book of Revelation, pearls adorn the gates of the New Jerusalem.